A 66-year old woman was in custody Friday evening after allegedly firing at sheriff’s deputies sent to check her welfare and then barricading herself at a senior living complex in Castaic.

The woman was taken into custody just after 11 p.m. and was being medically evaluated at the scene, according to the Los Angeles County Sheriff’s Department.

The woman was said to have been demonstrating “bizarre, paranoid and irrational” behavior before authorities were called, according to Deputy Joanna Warren from the Los Angeles County Sheriff’s Department.

Deputies were called by the Department of Public Social Services just before 4 p.m. to do a welfare check at the building in the 31000 block of Castaic Road and heard at least one shot fired as they approached the woman’s apartment, prompting a SWAT response and evacuation, Warren said.

Evacuees were taken on a city bus to the Castaic Aquatic Center, where the Red Cross was providing food, drinks and medication. It’s unclear when they would be allowed to return home.

Authorities said the woman was holed up in the first floor of a three-story building.

There were no immediate reports of any injuries.

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