Oakland police arrested two people over the weekend after a gunshot at a backyard party led officers to an alleged cache of illegal firearms.

Just after 2:15 a.m. Sunday, officers were sent to a home in the 7500 block of Arthur Street in East Oakland’s Arroyo Viejo neighborhood in response to an alert from the city’s automiatic gunshot detection system.

When they arrived, officers discovered people having a party in the backyard and allegedly found evidence of a shooting, police said Thursday.

Several people were detained and two were arrested, according to police, after officers found two rifles — including an assault rifle that had previously been reported stolen — and a handgun allegedly hidden behind a garage near the property.

Two guns were found in a vehicle parked in the driveway and another was found inside the home, police said, adding that officers also found two other guns, one of which was a stolen handgun, somewhere else.

Officers “additionally recovered evidence consistent with narcotics sales,” police said in a news release.

Both people who were arrested were residents of the home. Police didn’t specify what charges they might face.

Anyone with information can call the Oakland Police Department Felony Assault Unit at (510) 238-3426 and can send photos and video to cidvideos@oaklandca.gov.

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