A US Central Command investigation found that a March US airstrike in northern Syria did in fact strike a building that was part of a mosque complex." For days following the March 16 strike, the Pentagon adamantly rejected the notion that a mosque was hit and that there were civilian casualties - even as numerous social media reports showed images of bodies being taken out of the rubble. Instead, in the initial hours following the strike by US drones and aircraft, the Pentagon insisted that it hit only a building some 40 feet away from the mosque, where it said al Qaeda members were holding a meeting. Typically any religious structure would be on a so-called no-strike list, along with hospitals and schools. There are procedures to move structures off the no-strike list if it is clear they have lost their protected status because terrorists are using them and there are no civilians present. It is ... not clear if the building was listed as a religious site on a database that the mission planners were unaware of. One official said the investigation found that "religious use" was a primary function of the building at times. The day after the strike, Pentagon spokesman Capt. Jeff Davis told reporters: "We do not currently assess there were any civilian casualties."