(Photo by Adam Gerard)

Updated 9/25: The cyclist succumbed to his injuries, according to the Metropolitan Police Department. He has been identified as Thomas Hendricks Hollowell, a 64-year-old from Arlington.

Police said the driver of a dark-colored sedan ran through a red traffic light, hitting Hollowell at “a high rate of speed.” The sedan drove northbound on 12th Street NW without stopping.

Hollowell was an employee at Smithsonian National Museum of Natural History, which described him as “a beloved member of our staff” for more than two decades. “Tom was seldom seen without a smile on his face and never hesitated to offer a kind word to anyone,” the museum said in a statement. “We are saddened by his tragic loss and, on behalf of the entire Smithsonian Institution, extend our deepest sympathies to Tom’s family and friends.”

Original:
Police are investigating a hit-and-run of a cyclist in downtown D.C. on Monday morning.

The unidentified cyclist was hit at 12th Street and Constitution Ave. NW near the National Mall around 7:30 a.m.

Police tell DCist via email that the victim is an adult male and was transported to an area hospital for treatment, where he is in critical condition. There is no further information available and the case remains under investigation.

Officials have not given a description of the striking vehicle. Police said they’ll be checking red light camera footage in a search for the driver, according to NBC Washington.

The 12th Street tunnel and the 1000-1300 blocks of Constitution Ave. were shut down shortly before 8 a.m. By 10:31 a.m., the tunnel had been reopened.

In 2015, Mayor Muriel Bowser and the District Department of Transportation released an action plan called Vision Zero to address traffic-related fatalities and injuries. The goal of the program is to reach zero deaths and injuries in traffic-related incidents by 2024.

Monday’s hit-and-run comes just days after a man riding a scooter died after being hit by a vehicle and trapped underneath it in Dupont Circle. Two cyclists were also killed this summer in traffic-related incidents, one on M Street NW and another on H Street NE.

This post has been updated with comment from D.C. police.