DALLAS—The father of a Dallas police officer killed by a sniper after a July protest against police brutality is suing Black Lives Matter, the Nation of Islam and a handful of other defendants saying they incited a “war on police.”

Enrique Zamarripa, the father of slain officer Patrick Zamarripa, filed the lawsuit Monday in the Northern District of Texas federal court. Zamarripa is represented by Larry Klayman of the group Freedom Watch, who has filed similar lawsuits on behalf of police officers in Dallas and other cities.

Patrick Zamarripa’s mother, Valerie Zamarripa, issued a statement Tuesday saying that she was not part of her ex-husband’s lawsuit.

Five officers were killed after the July protest organized by Dallas-based Next Generation Action Network, which is not directly affiliated with Black Lives Matter.