This is a developing story...
All gates are closed at Camp Pendleton and the CHP has issued a SIG alert for the area.
Oceanside Police tell KOGO NEWS a man approached the base's main gate around 3A.M.
When security denied his entry, he left, then returned to drop off a suspicious package at that gate.
San Diego Sheriff's Deputies are on the way to the scene to assist. OPD is still searching for the ban.