Israeli airstrikes Monday hit the southern city of Rafah, killing at least 67 people according to local health officials in the area of the Gaza Strip where 1.4 million civilians have already fled to in order to escape the war.

Residents described heavy bombing, with the Israeli strikes hitting several houses and mosques.

The Israeli military said it struck “terror targets” in part of Rafah, and that the strikes coincided with a mission that rescued two Israeli hostages who were being held by Hamas militants.