Update, 11:26 a.m.:

Metro officials report that normal service has resumed at Gallery Place station.

Update, 10:49 a.m.:

Green and Yellow line trains are no longer single tracking. Riders should expect residual delays in both directions for about 30 minutes, Metro officials said.

Update, 9:22 a.m.:

Metro spokesman Dan Stessel said Metro Transit Police confirmed the person who was struck by a train a the Gallery Place Station has died. He said the person was an adult male. At 9:10 a.m. the medical examiner arrived and pronounced him dead.

Trains continue to single-track from Mt. Vernon to Archives, causing delays. Metro officials said customers headed into the District from Virginia should take the Blue line.

Passengers on the train that hit the person were offloaded through the doors of the train into Mt. Vernon Square station.

Update, 9:05 a.m.:

Metro officials said they believe the victim, described only as an adult man, intentionally jumped in front of a northbound Yellow line train. The incident happened at approximately 8 a.m. at the Gallery Place station, officials said.

Update, 8:52 a.m.:

Metro fire officials confirmed that the victim struck by a Yellow line train this morning is dead.

It has not yet been confirmed if the person, whose identity has not been released, jumped in front of the train.

Delays are mounting on both the Green and Yellow lines, as well as the Blue line, due to crowding.

Original post, 8:24 a.m.:

Green and Yellow line trains are experiencing significant delays after a person was struck by a Yellow line train at the Gallery Place Metro station Wednesday morning.

Trains are single-tracking between Archives and Mt. Vernon Square, Metro officials said. Numerous trains are off-loading passengers and delays are expected in both directions for an undetermined length of time, officials said.

 Staff writer Dana Hedgpeth contributed to this report.