Eleven people were injured in an apparent drive-by shooting in Washington D.C. early Monday morning.

The shooting occurred around 2 a.m. outside an apartment complex not far from the U.S. Capitol building. Police have made public surveillance footage that shows two cars speeding by and firing on a crowd that may have just exited a club that emptied minutes before. Eleven people were hurt, one seriously, but police say all the victims remained conscious and no one is believed to have sustained life-threatening injuries. The seriously injured victim was shot in the back, police say.

The motive for this attack remains unknown as police continue to interview witnesses. A similar shooting took place in October of last year, but it is not known if the two incidents are related.