A man shot and killed his adult son on Staten Island Friday night, cops said.

The 57-year-old suspect opened fire inside his Bay Street home in Rosebank just before 7:30 p.m. on New Year’s Eve, according to police.

His 29-year-old son was not identified. It was not clear what led to the deadly domestic violence.

The suspect was in police custody and charges were pending on Friday night.