OXON HILL, Md. (AP) — Maryland police say they are investigating the motive behind the fatal stabbing of a Virginia man by two Maryland teens.

Eighteen-year-olds Maicol Alvarado-Baide and Erlin Andrades-Zelaya have been charged with first- and second-degree murder for the February slaying of 23-year-old Yefrin Argueta, of Arlington, Virginia.

A Monday Prince George County Police news release says both teens, of Oxon Hill, Maryland, are suspected gang members, though it did not specify which gang. The release says the victim knew the teens, but did not say how. It also says the teens are being held without bail.