Updated, 8:26 a.m.
Montgomery County police report the boy has been located and reunited with his family.
Felix Antonio Melgar was last seen about 3:30 p.m. on Friday, at his home in the 7900 block of Spiceberry Circle in Gaithersburg, according to Montgomery County Police.
Police described Felix as about 4 feet 7 inches tall, and about 80 pounds. He has brown eyes and black hair, and was last seen wearing a long-sleeve black and white striped shirt, blue jeans and black Nike athletic shoes. He is known to frequent the Flower Hill area.
Police asked anyone with information to call 301-279-8000 or 240-773-5400.