Two motorcyclists were killed and a third injured in separate weekend crashes, authorities said.

The latest crash occurred shortly before 2:30 p.m. Sunday when a 21-year-old Lakeview man on a motorcycle collided with a Mercedes-Benz at the intersection of Langdon Boulevard and Jefferson Avenue in Lakeview, Nassau police said.

The motorcyclist was transported to Winthrop-University Hospital, where he is listed in critical condition. Nassau police did not release the man’s identity.

The driver of the Mercedes-Benz, a 46-year-old woman, was treated and released from a hospital, police said.

The crash Sunday followed two fatal motorcycle accidents Saturday.

Edward Okon, 49, of Mount Misery Road in Melville, was charged with driving while intoxicated after being involved in a crash that killed a motorcyclist in East Farmingdale Saturday night, Suffolk County police said.

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The victim was identified by police as Tomasz Myszke, 39, of Copiague.

Myszke was traveling south on Wellwood Avenue on a 2003 Suzuki motorcycle at 11:15 p.m. when he struck a 2012 Ford F-150 pickup truck driven by Okon, 49, police said.

Okon was driving his pickup truck north on Wellwood Avenue and making a left turn onto Conklin Street when the crash occurred, police said.

Myszke was pronounced dead at the scene by a physician assistant from the Office of the Suffolk County Medical Examiner, police said, and Okon was not injured in the crash.

Both vehicles were impounded for safety checks and the investigation is continuing. Detectives ask anyone with information about the crash to call the Major Case Unit at 631-852-6555.

In a separate accident, a 29-year-old man was killed late Saturday in North Bellmore while riding his motorcycle westbound on the Southern State Parkway. State Police said no other vehicles were involved in the collision, which occurred just after 11 p.m. east of Exit 25N and closed the westbound lanes until 2:30 a.m. Sunday, police said.

Police have not identified the victim in that crash.

With Darran Simon