GENEVA (AP) — Human rights experts commissioned by the U.N.’s top human rights body say they have found “reasonable grounds” to believe the United States committed war crimes in two strikes in Iran, including on a school in the southern city of Minab.

The international fact-finding mission on Iran says the findings center on a pair of airstrikes which killed at least 178 civilians, including women and children.

“Following the United States and Israeli attacks on 28 February, the mission found reasonable grounds to believe the United States committed the war crime of launching indiscriminate attacks resulting in the loss of life or injury to civilians or damage to civilian objects,” the fact-finding team said in a statement.

The team also said that killings by state security forces occurred on a “staggering scale” in Iran.

It said civilians were caught between “gross human rights violations and crimes against humanity committed by their own government and the nation’s deadly conflict with the United States and Israel.”

At the start of the war in February, at least one U.S. missile hit the Shajareh Tayyebeh in Minab, according to an Associated Press investigation. There has been no final accounting of what happened. Iranian state media have said 168 people were killed in the strike, most of them children.