At 1 a.m. Sunday, a cab had just picked up three passengers at Market and Ballard Ave. when a man — who may have known them — tried to get inside. As the cab was pulling away, passengers slammed the door on him, police said.

That’s when the man jumped on top of the cab, “and was carried on the trunk for a short distance,” police say. After falling off, he ran next to the cab. “According to witnesses, it was unclear if the victim was being dragged intentionally or merely got hung up on the cab and was being carried along,” officers say.

That’s when the man fell and hit his head on the street, sustaining “major head trauma.” The cab, meanwhile, drove away without stopping or calling 911, police say. And that means it’s now the subject of a hit-and-run investigation. Seattle Police don’t have the cab company name or plate number — just the fact the vehicle drove away eastbound on Market St.

If you know anything about this incident, you’re asked to call 911.