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Four months after the outbreak of open conflict between a US-Israeli coalition and Iran across the Middle East that left thousands dead, international mediators have secured a formal agreement to end hostilities. But even with the war coming to a close, researchers and analysts warn that the full human cost of the conflict may never be accurately known, with multiple barriers blocking transparent casualty reporting across the battle zone.

Official government data from Iran and Lebanon alone puts the confirmed death toll at more than 7,300 since fighting began on February 28, a count that already includes hundreds of children and dozens of medical workers. Additional fatalities have been recorded across neighboring Gulf states, Iraq, Israel, and among international military personnel and commercial sailors, pushing the total confirmed death toll well above 7,500. However, nearly all independent observers agree this number is a drastic undercount, hobbled by internet blackouts, government information restrictions, limited access to conflict zones, and the fragmented control of territory by armed groups that makes systematic counting impossible.

“When conflict spreads across multiple sovereign states and non-state controlled areas, casualty records are often incomplete, delayed, or impossible to cross-check independently,” explained Dr. Iain Overton, executive director of the UK-based non-profit Action on Armed Violence. Dr. Overton, who has studied conflict casualty reporting across the Middle East for decades, added that “the final death toll will likely remain contested for years after the final shot is fired, matching patterns seen in past wars in Iraq and Syria where undercounting ran into the thousands.”

In Iran, official government figures released April 26 by state news agency IRNA put the national death toll at 3,468, split between 1,460 civilian residents and 2,008 military personnel, including 499 women. But the US-based independent monitoring group Human Rights Activists News Agency (HRANA) puts the confirmed death toll substantially higher at 3,636, with 1,701 civilians among the dead — 307 of them children. HRANA’s May 18 report emphasizes that even this higher number is an absolute minimum, as data collection has been crippled by restricted access to strike sites, government-mandated internet shutdowns, and political pressure that leads both authorities and families to withhold information about conflict deaths.

“Authorities routinely hide casualty data, and many families face direct pressure not to speak publicly about how their loved ones died,” said Skylar Thompson, HRANA’s deputy director.

Iranian officials have repeatedly accused US and Israeli forces of deliberately targeting civilian infrastructure across the country. Multiple independent inquiries have confirmed that a US missile strike on the first day of the war hit a public school in the southern Iranian town of Minab. Iranian authorities say the attack killed 168 people, 110 of them children, and the US military has confirmed it is conducting an internal investigation into the incident. Days later, a missile strike on a girls’ volleyball match in a Lamerd town sports hall killed 20 people, according to Iranian officials. While the US has denied responsibility for the attack, analysis for BBC Verify by independent arms experts found the weapon used was likely a US-made Precision Strike Missile (PrSM).

The conflict expanded rapidly beyond Iran’s borders when Hezbollah, the Iran-aligned Lebanese armed group, launched a rocket barrage into Israel on March 2 in retaliation for the killing of Iran’s supreme leader in the opening days of the war. Israel responded with a sustained air campaign and a full ground invasion of southern Lebanon, which has produced the highest single national death toll of any country in the conflict.

Lebanese government health data confirms 3,912 people have been killed in Israeli strikes across the country, including 366 women and 247 children. The Lebanese health ministry has not clarified how many of the dead are active Hezbollah fighters, and the group has not released its own official casualty counts. Israeli Prime Minister Benjamin Netanyahu claimed last month that roughly 3,000 Hezbollah fighters had been killed since the war began.

Controversy has followed multiple high-profile Israeli strikes in Lebanon. In early March, an Israeli air and ground operation in the eastern Bekaa Valley killed 41 people, according to Lebanese officials. The Israel Defense Forces (IDF) said the operation was intended to recover the remains of an Israeli airman who went missing in a 1980s conflict in Lebanon, but Lebanese authorities confirmed three of their own troops, plus dozens of civilians and children, were among the dead. On April 8, a massive coordinated wave of Israeli strikes killed 361 people across Lebanon in just 10 minutes, Lebanese officials reported. The IDF said all 361 killed were Hezbollah operatives targeted in planned raids, a claim the Lebanese health ministry has rejected, saying the vast majority of fatalities were civilians. Seven UN peacekeepers deployed to Lebanon have also been killed in cross conflict violence, with the most recent death recorded on June 4.

The high number of civilian casualties in Lebanon has drawn widespread international condemnation of the IDF’s campaign. In a rare public rebuke of key ally Israel by a US president, former President Donald Trump sharply criticized Israeli military tactics during a June appearance at the G7 summit in Paris. “Too many people have been killed in these strikes,” Trump said. “You don’t have to destroy an entire apartment building every time you go after one person — most of the people living there aren’t Hezbollah.”

On the Israeli side, government data provided to the BBC confirms 60 people have been killed in the country as of June 18, most in Iranian missile strikes and Hezbollah cross-border fighting. Twenty-nine of the dead are civilians, 21 of whom were killed in Iranian missile attacks, while 31 IDF soldiers died in combat operations. One additional fatality was recorded as accidental friendly fire. Israel has repeatedly accused Iran of deploying banned cluster munitions against Israeli population centers. In one documented incident, an elderly couple in their 70s was killed while traveling to an air raid shelter in the town of Ramat Gan when cluster bomb submunitions hit their vehicle. Human Rights Watch (HRW) released a report in March accusing Iran of committing war crimes through the use of cluster munitions against civilian areas.

“Cluster munitions scatter explosive submunitions across huge areas, making them inherently indiscriminate and a violation of international laws of war,” explained Patrick Thompson, a HRW crisis and arms researcher.

In the opening weeks of the conflict, Iran launched retaliatory missile and drone strikes against US military bases located across eight neighboring regional states: Saudi Arabia, the United Arab Emirates (UAE), Qatar, Kuwait, Iraq, Jordan, Bahrain and Oman. Many of these strikes hit civilian infrastructure including airports, energy facilities and commercial ports, and falling debris from intercepted missiles often landed in residential areas, causing additional civilian casualties. The strikes sparked fierce backlash from Iran’s Arab neighbors. “Your war is not with your neighbors, and this escalation only confirms the narrative of those who see Iran as the primary source of instability and danger in this region,” wrote Dr. Anwar Gargash, senior adviser to the UAE’s president, on social media.

Building a complete picture of total conflict fatalities across the entire Middle East remains a major challenge, as many affected states have not published full cumulative casualty data. What data is available confirms additional deaths across the region: the UAE’s defense ministry has confirmed 13 people killed in Iranian strikes, while Al Jazeera and Agence France Presse have recorded more than 100 deaths in Iraq, at least 80 of them members of the Iran-aligned Popular Mobilisation Forces paramilitary killed in US and Israeli strikes. The Pentagon has confirmed 13 US military personnel based in the region have been killed, seven in Iranian attacks and six in a refueling plane crash in Iraq. The International Maritime Organisation has recorded 14 civilian sailors of multiple nationalities killed in attacks on commercial shipping in the Strait of Hormuz and other regional waterways.

Dr. Overton reiterated that systemic barriers to reporting have suppressed casualty numbers across the region. “Access restrictions, destroyed civilian infrastructure, and political sensitivities have all limited transparent counting, in some cases suppressing entire casualty tolls,” he said. “Historical experience from conflicts across this region makes clear that the final death toll will stay contested, and could end up being far higher than the numbers we have access to today.”