JERUSALEM (JTA) — An airstrike by the Israeli military leveled a 12-story apartment building in Gaza City.

The building housed a Hamas operations room, according to the Israel Defense Forces.

The IDF called residents of the building ten minutes before the attack and warned them to evacuate the building, according to the Palestinian Maan news agency. A warning missile was fired five minutes before the attack, according to reports.

At least 18 people were injured in the airstrike, and no one was killed in the attack, according to Maan.