The latest on the situation on Union Station in the nation's capital, with police on the scene and law enforcement telling people to stay clear. All times local:

2 p.m.

Police say there was no apparent connection between a shooting at Washington's massive Union Station and the anniversary of the Sept. 11, 2001, terrorist attacks.

D.C. police Commander Jeff Brown told reporters at the station that fears were heightened Friday because of the timing but that the facility was secured without incident.

Police have said that a man stabbed a woman and then was shot by a security officer at the transit hub.

Brown says the officer was a private security guard associated with the Securities and Exchange Commission. Brown says the man "lunged" at the guard with a knife.

Brown says the guard fired one shot and the man was wounded in the side. Both the man and the woman are believed to have injuries that aren't life-threatening.

Amtrak is based at Union Station. Polly Hanson of Amtrak police says trains were briefly halted and the station was briefly evacuated. She says the station has since reopened and trains are running normally.

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1:45 p.m.

Police say a man stabbed a woman and he was then shot by a security guard at Washington's busy Union Station.

DC Police spokeswoman Gwendolyn Crump says in a statement that the guard saw the man stab the woman on Friday and chased him. She says the man turned and pointed the knife at the security guard, who opened fire and the man was shot.

Crump says the stabbing was believed to be the product of a domestic dispute.

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1:40 p.m.

Police say a female was stabbed at a busy transit hub in Washington, and a security officer shot the suspect.

DC police tweeted Friday that both people were being treated for injuries.

An emergency services official confirmed that two people were injured in the situation at Union Station.

D.C. Fire and EMS spokesman Timothy Wilson said one patient was in critical condition, and the other's condition was not immediately known.

Union Station is a major train station and transportation hub in Washington. It is Amtrak's headquarters. It has dozens of restaurants and retail shops. Amtrak says some 90,000 people pass through each day.

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1:20 p.m.

Law enforcement officials are warning people in the nation's capital to stay clear of Union Station because of police activity.

The Senate sergeant at arms tweeted Friday afternoon: "Due to police activity, remain clear of the area near Union Station. Please avoid this area until further notice."

Washington police tweeted that they were on the scene but said it's not an active shooter situation.

Union Station is a major train station and transportation hub in Washington. It is Amtrak's headquarters.

As they were elsewhere around the country Friday, flags on the towering poles outside the main entrance to Union Station were flying at half-staff in remembrance of the terrorist attacks on Sept. 11, 2001.