Multiple tipsters have reported police activity on Market Street between Dolores and 14th Street tonight.

According to witnesses, a pedestrian was struck and killed by the driver of a vehicle heading northeast on Market Street near the Market & Dolores Whole Foods. Initial reports indicate that the driver remained at the scene.

"There were six or more police cars on the south side of Market Street between Church and Dolores (outside the Whole Foods) at the scene of what appeared to be an accident or crime involving a car," said tipster Luke B. "There was a tarp over what may have been a body on the median." The Medical Examiner was on the scene as of 9:30pm, and the victim was pronounced dead at the scene.

Update, 10:15pm: The collision occurred at 7:48pm, according to SFPD spokesperson Giselle Talkoff, when "a vehicle traveling eastbound on Market (at Dolores) struck a pedestrian who was walking outside of the crosswalk. The pedestrian succumbed to injury on scene."

Westbound traffic on Market was unaffected, but eastbound traffic was blocked, and multiple F-Market trains backed up, at 14th Street.

Update, 11/7: According to the SFPD report on the incident, the victim was a 55-year-old man. The report also confirms that the driver of the vehicle remained at the scene.

Update, 11/14: The Examiner reports that the victim has been identified as 68-year-old San Francisco resident Ronald Merritt Jr.

We'll update with additional details as we learn more.