"Mall is closed," a rep for the Columbia Mall said in a statement. "Believe that the situation may be over, but the mall is closed."
UPDATE: Police have now confirmed that three people were killed in the Columbia Mall shooting. It is not yet known if the shooter was one of the victims, but one of the deceased was discovered near guns and ammunition.
I work in Cartoon Cuts; I was downstairs getting a tea for my boss," one witness told NBC Washington. "And all of a sudden I heard ... it sounded like someone dropped something. And all of a sudden I see people fall, three people fall to the ground. And all I see is people going down to the floor and running. I just saw everybody run, so I ran."
UPDATE 2: According to the Howard County Police's Twitter page, one of the dead is apparently the Columbia Mall shooter.
Police are set to give a press conference about the Columbia Mall shooting. You can watch live coverage here via the local ABC station.
UPDATE 3: Brianna Benlolo, 21, and Tyler Johnson, 25, are the confirmed victims of the Columbia Mall shooting. The two were employees at the Zumiez shop where the attack occurred. There are unconfirmed reports that Benolo was the shooter's ex-girlfriend, and that Johnson was Benolo's new boyfriend. However, this is not yet official.
UPDATE 4: On Sunday morning, police confirmed the shooter's identity as 19-year-old Darion Marcus Aguilar. There is still no word on whether or not he knew his two victims.
This Columbia Mall shooting is just the latest gun tragedy to unfold this week. On Friday, student Brandon Robinson was shot dead at South Carolina State University. Justin Bernard Singleton, 19, was arrested on murder charges after reportedly shooting Robinson in the neck during an argument.
On Tuesday, Purdue teaching assistant Andrew Boldt was allegedly killed by fellow TA Cody Cousins. Cousins was charged with murder on Thursday, but a motive for the attack is not yet known.
And on Monday, a student at Widener University in Pennsylvania was shot and critically injured inside his car outside the school's gym. Police are still searching for a suspect in this crime.
Below are some Twitter reactions to the deadly Columbia Mall shooting.
"Columbia mall was always one of my favorite malls too smh," wrote @_dre_day.
"My thoughts & prayers go out to all the people @ the Columbia Mall in MD and to their families," wrote @omalleypicks. "Just awful."
"Why do these things keep happening and when is the violence going to stop?" wrote @katiexcaro. "Thoughts go out to those at the Columbia mall this morning."