LAWRENCEVILLE, Ga. -- Gwinnett County police seized 457 pounds of marijuana, arrested four men and confiscated five guns, including an M16 and AK-47 assault rifles, authorities announced Thursday.

Police said the arrests came June 24 after a tip from someone concerned about possible drug activity at a house in Lilburn. Following a traffic stop of a vehicle that was seen leaving the residence, investigators said they found 10 pounds of marijuana in a garbage bag.

Investigators then searched the home, finding $2.1 million worth of marijuana, guns and a large amount of ammunition.

Held without bond on charges including drug trafficking are: Miguel Flores, 31, of Lawrenceville, Isalias Corona, 25, of Mableton, and Javier Arroyo, 41, and Huber Zarco-Huto, 40, both of Lilburn.