WASHINGTON, D.C. (WNCN/NewsNation) – Metropolitan police confirm the shooter that opened fire in Washington, D.C. on Friday afternoon pulled the trigger on himself as officers were entering his apartment later in the day.

At a news conference, Metropolitan Police Department Chief Robert J. Contee III said the man pulled the trigger as officers were entering his apartment and officers found six guns and “multiple” rounds of ammunition inside.

His name has not been released at this time.

Washington, D.C. police responded to an active shooting incident in the areas of Connecticut Avenue and Van Ness Street in the Northwest area of the United States capital, CBS 17 learned on Twitter.

The threat came after a shooting took place near Edmund Burke College on Friday afternoon, where witnesses said a slew of shots were heard.

Four people were shot, tthree adults and one child, officers confirm. They have all been located.

Police said in a news conference that the two adults are in stable condition, but there is not yet word on the child’s condition as of 5:43 p.m. However, two are believed to be in critical condition an update from NewsNation said just before 7:20 p.m.

The third adult’s condition, which is stable, was not announced until police gave an update on the shooter at 10:17 p.m.

Their ages have been given as 60, 12, 30s and 50s.

Police urged people to shelter in place when they completed a sweep in the Cleveland Park, Van Ness and D.C. Zoo areas.

A university, The University of D.C., made its students aware of the situation and locked down its campus, its official Twitter account said at 4:04 p.m.

Connecticut Avenue, Van Ness Street and Albermarle Street all closed to traffic, sources also confirmed on Twitter. A heavy presence of ambulances, police and fire vehicles could be seen on Connecticut Avenue Northwest.

NewsNation has contributed to this developing story.