About 20 people, including at least 12 civilians, were killed on Monday in the northern Iraqi city of Mosul, in two air strikes that destroyed houses believed to be used by ISIS militants, six eyewitnesses and a medical source said.

Nearby buildings were also damaged, they said.

The two strikes happened within a 10-minute gap at about 3 p.m. local time, targeting the houses of a local ISIS commander and his son in the July 17 district of western Mosul, said the witnesses, contacted from Baghdad.

Government officials were not immediately available for comment.

ISIS captured Mosul, Iraq’s second-largest city, in 2014. The United States and its allies have been carrying out air strikes against Islamist militants in Iraq since August 2014.

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