Police say a search of the home turned up nine pounds of explosives materials and large amounts of bomb-making chemicals.
According to a search warrant, items seized from the house included sulfuric acid, nitric acid and hydrochloric acid.
Authorities also confiscated a grenade mold, a bag with pieces of metal, a jar with ball bearings and three wireless doorbells with remotes. Two handguns, a .22-caliber Ruger and a Glock 19 also were taken, along with a blue Escondido police shirt.
Jakubec is also charged with three San Diego County bank robberies.
Jakubec remained jailed on $5.1 million bail.
The Associated Press Contributed to this report.
