All hostages were rescued at Beth Israel Synagogue in Colleyville, Texas, where authorities said an armed man had them trapped for roughly half the day on Saturday, according to Gov. Greg Abbott.

The governor announced the rescue, which involved roughly 60 to 70 officials from Washington, D.C., after reporters on the scene said they heard a loud explosion. The four “unharmed” hostages, all of whom are adults, are “not in need of medical attention,” officials said at a press conference at 10:15 p.m. local time.