Kristians Pelss disappeared Tuesday, and local media reported that the 20-year-old player jumped off a bridge in central Riga into the fast-flowing Daugava River.
Rescue services spokeswoman Viktorija Sembele says her department received a call at 1:40 a.m. Tuesday that a man had jumped from the bridge. Police began an investigation.
Police spokesman Tom Sadovskis said Friday police had "suspicions" the man on the bridge had been Pelss, but declined to say why or give further information.
Pelss arrived home in Riga on Monday after playing last season with Edmonton's top minor-league team, the Oklahoma City Barons of the AHL.