Authorities in Montgomery County are asking for help locating a Silver Spring boy with a medical condition who has been missing since Friday.

Daniel Juwan Howard, 17, was last seen wearing blue jeans, a black T-shirt and black boots. The Montgomery County Police Family Crimes Division describes him as a black male with a dark complexion, who is about 6-foot-3 and weighs 150 pounds. He has brown eyes and short, black hair.