A 29-year-old man was arrested early Monday, 36 hours after the ambush killing of a Los Angeles County sheriff’s deputy who was shot as he sat in a patrol car, authorities said.

The suspect barricaded himself inside a home in the city of Palmdale for several hours, but later surrendered and weapons were recovered, Los Angeles County Sheriff Robert Luna told a news conference. Sheriff’s officials identified the arrested suspect as Kevin Cataneosalazar of Palmdale.

Luna said authorities have not yet determined a motive for the killing of 30-year-old Deputy Ryan Clinkunbroomer on Saturday evening. He described the situation as “fluid” and said there could be more arrests.