Police say guests at two parties for teenagers have been killed in unrelated shootings on Long Island this weekend.

Suffolk County police say 27-year-old Douglas Martinez was shot multiple times outside a house party in Brentwood around 10 p.m. Saturday. Then, around 1:30 a.m. Sunday, 18-year-old Rashad Capers was gunned down on a street near a gathering he’d attended in West Babylon.

Police say guests of honor at both parties were 13-year-olds. It’s not clear whether the celebrations were for birthdays or other reasons.

No arrests have been made.

Martinez was found in the front yard of a house on Brentwood’s Yarnell Street. He lived in Bay Shore.

Capers was found lying in Centerwood Street, where he lived. He was shot on nearby St. Johns Place.