The Ukrainian military launched several US-made ATACMS long-range missiles armed with highly controversial cluster munitions on Russia’s Crimea on Sunday, resulting in numerous civilian casualties, the Defense Ministry in Moscow has said.

The strike was first reported by Sevastopol Governor Mikhail Razvozhaev. He said that the attack killed at least three people, including two children. The death toll later rose to four. According to Russia’s Health Ministry, 124 people were injured, including 27 children.

The Russian Defense Ministry has confirmed the Ukrainian attack, which it said took place at around noon local time. Officials said that the shelling involved five ATACMS missiles, four of which were destroyed mid-air.

The remaining one, however, was damaged by air defenses, veered off course and detonated over the city of Sevastopol. As a result, the falling fragments of cluster munitions led to numerous civilian casualties, the statement read