Eleven police officers were shot ambush-style, including five fatally, in Dallas Thursday night by at least two snipers, amid a protest against the recent police shootings of two black men, Alton Sterling in Louisiana, and Philando Castile in Minnesota, according to the Dallas Police.

One of the suspects had engaged in a standoff for several hours with police, but a Dallas city official announced around 3:30 a.m. that it was over. That suspect is now dead, according to Dallas Mayor Mike Rawlings.