Authorities sought the public’s assistance Tuesday in locating an at-risk 66-year-old woman last seen in Northridge, prompting the issuance of a Silver Alert.

Katri Lee-Riley was last seen near Roscoe and Reseda boulevards at approximately 12:30 p.m. Monday, according to the California Highway Patrol, which activated the alert on behalf of the Los Angeles Police Department.

Riley was described as a 5-foot-4-inch-tall woman weighing 150 pounds with brownish-orange and gray hair. She has brown eyes and was last seen wearing a black robe.

Anyone with information regarding Riley’s whereabouts was urged to call 911.

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