At Least 21 Shot After Multiple Gunmen Open Fire In DC During Party

WASHINGTON, D.C. — A 17-year-old is dead and at least 20 others shot during a large party that ended in chaos and violence last night.

Police say at least three gunmen are responsible for the mass shooting, which they say happened after a dispute broke out during a cookout that was attended by hundreds of people.

The crime scene spread out over multiple blocks as victims ran for safety.

At least 7 of the shooting victims are in critical condition. An off-duty police officer is among those in critical condition.

Earlier, police had stopped by the party, but did not have enough officers to break it up.

This is a developing story.