Two people were killed in a head-on car crash in Nassau County, Long Island on Saturday night, police said. Cops said Michael Colonna, 35, crossed over the center yellow line and slammed into Dora Salmeron, 53, according to Newsday. Colonna was ejected from his vehicle and later pronounced dead at a nearby hospital, while Salmeron was pronounced dead at the scene. Colonna was traveling northbound in a Nissan Altima on Glen Cove Road over the Long Island Expressway at a high rate of speed, cops told Newsday. He then crossed over and struck Salmeron, who was driving southbound in a Nissan Pathfinder, authorities said. Cops arrived on the scene at 11:55 p.m. Saturday. Investigators did not publicly speculate on why Colonna drifted into the southbound lanes. The incident in Old Westbury was not the only deadly car crash on Long Island over the weekend. On Sunday evening, a one-car wreck in Levittown left two people dead, according to Newsday. An 89-year-old man was driving a 2001 Ford Taurus southbound on Loring Road when the car left the road and struck a utility pole, Newsday reported. The impact of the wreck killed the man and his passenger, an 88-year-old woman, cops said. The victims have not been publicly identified. And elsewhere on the island, a Suffolk County police officer was seriously injured and airlifted to a hospital following a two-car crash Sunday night, News 12 Long Island reported. The officer has not been identified. The driver of the other car suffered non-life-threatening injuries.