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People walk through Union Station in Washington, D.C., July 25, 2012. Reuters

UPDATED 1:45 p.m. EDT: Police in Washington, D.C., said on their Twitter page that a woman was stabbed and a male suspect was shot by a security guard in Union Station Friday. Both people were being treated for injuries as police continued to investigate the situation.

UPDATED 1:30 p.m. EDT: Police at Union Station told the Washington Post at least one shot was fired near the Union Station McDonald's, located in the food court. One person was seen taken out a side entrance of the station a little after 1 p.m. The U.S. Senate sergeant-at-arms tweeted at 1:23 p.m. that all police activity was finished at Union Station.

Original Post: Amid unconfirmed reports of an active shooting Friday at the Union Station transit hub in Washington, D.C., local police officials said there was not an active shooter situation. Many said over Twitter that they heard several shots fired in the station’s food court. Photos posted on Twitter showed a heavy police presence outside of the station. Some social media users said Union Station had been evacuated and that helicopters were circling above the station.

Local police later said a security guard had shot a person at Union Station Friday, according to the Washington Post. Sean Conway, a police spokesman, told the Post he had no further information about the shooting or where it occurred. The condition of the person who was shot was not immediately known.

Train operations appeared to be running regularly. Union Station is visited by roughly 20 million people each year. It is located at 50 Massachusetts Ave., NE.

This story is developing...