Authorities are investigating the death of a Derby woman and a knife attack on her teenage son.

Police Chief Robert Lee says Charles Alfred Beck is a suspect in the attack on the teen and a person of interest in the mother’s death. No charges have been filed.

Another child in the home called 911 around 10 a.m. Sunday to report a disturbance.

The mother and son were rushed to a hospital, where the mother was pronounced dead and the teen was being treated for serious neck wounds. Lee didn’t release their names. He says an autopsy will be performed Tuesday to determine how the mother died.

Beck was living with the family. Lee says he should be considered armed and dangerous. He was last driving a white Dodge Caravan.