10:42 AM PT -- The Miami-Dade Police Department tells TMZ Sports ... Konstantin Koltsov was found dead in an apparent suicide at around 12:39 AM on Monday at the St. Regis Bal Harbour Resort.
An investigation into the death is ongoing, but cops said no foul play is currently suspected.
Ex-NHL player Konstantin Koltsov -- the boyfriend of tennis star Aryna Sabalenka -- has died.
The hockey player's former club in Russia, Salavat Yulaev, announced the heartbreaking news Tuesday .