It happened just before midnight at Fresno and California Streets.
Police said officers pulled over a van with eight people inside because two of them were not wearing seat belts. Officers say the driver had a suspended license. Police searched the van and say they found two loaded guns under the seats.
Officers arrested two men for the weapons and a woman for having a small amount of crack cocaine. Police say everyone in the van are convicted felons and gang members.
Police say two others were also cited for not wearing seat belts.
