Newark, N.J. ? Two more suspects were arrested Saturday in the execution-style shootings of three college students in a schoolyard, marking five arrests in a case that has stunned a city where gun violence is common.

The two suspects were found in suburban Washington and are awaiting extradition to New Jersey, authorities said.

Rodolfo Godinez, a 24-year-old Nicaraguan immigrant, was arrested about 1 a.m. in an Oxon Hill, Md., rooming house, said John Cuff, an investigator with the U.S. Marshals Service.

Alexander Alfaro, 16, believed to be Godinez’s half-brother, was arrested in Woodbridge, Va., about 45 minutes later, said Robert Fernandez, commander of the Capital Area Regional Fugitive Task Force of the U.S. Marshals Service.

Authorities were still searching for an additional suspect.

The suspects were wanted in connection with the Aug. 4 slayings in which the victims were forced to kneel in front of a wall behind an elementary school and shot in the back of the head.