UPDATED 5:00 P.M.

BELLINGHAM — Police are pursuing leads but still have no suspects in the Sunday stabbing of a Skagit County man.

Witnesses told police that David L. Datskiy, 20, of Mount Vernon, and his passenger pulled their vehicle over about 1 p.m. on the 1500 block of James Street near Gladstone Street in the York neighborhood, said Lt. Steve Felmley, Bellingham police spokesman.

Felmley said another man pulled alongside Datskiy’s blue Honda from behind. Police originally believed the man, who was driving a late-'90s model white Cadillac, was alone, but said Monday morning they believe he had a female passenger. The drivers exited and began arguing before the second driver stabbed Datskiy with a knife and fled the scene.

Felmley said Datskiy’s passenger, a male friend, drove him to St. Joseph Hospital. Datskiy died due to blood loss from a single stab wound to his upper abdomen, said Whatcom County Medical Examiner Gary Goldfogel.

The stabbing is being investigated as a homicide. There is no indication at this time that Datskiy knew his attacker, Felmley said.

There is also no indication that Datskiy and the Cadillac driver were racing or driving aggressively before the incident.

Police are still looking for the assailant, who is described as a white man, 5 feet 8 inches tall, with a medium build, bald head, no facial hair, wearing a blue shirt and black pants. Police did not yet have a description of the female passenger Monday morning.

Datskiy has several criminal and noncriminal traffic violations on record in several counties, including Whatcom and Skagit counties. He was convicted in Lewis County in 2006 of possession of methamphetamine and in 2007 of jumping bail, according to a Lewis County Superior Court clerk.

Liana Datskiy, David's sister, said her brother worked with his father Leonid as an electrician. The family has lived in the Mount Vernon area for 14 years after immigrating from Rostov, Russia.

"He was practically loved by everyone," Liana Datskiy said of her brother.

Liana Datskiy said her brother was on his way to visit a friend in Bellingham when the fight broke out. The family is unsure what led to the altercation, but Liana Datskiy said David's car had been stalling recently, which could have caused a road rage incident.