Trabzonspor have confirmed RB Leipzig have made an offer for striker Alexander Sorloth and the Turkish side are opening disciplinary proceedings after he failed to return from international duty.
The Norway striker joined the Super Lig team on a two-year loan deal from Crystal Palace, but has been heavily linked with a move to Germany.
Palace reportedly rejected an offer from the Bundesliga outfit at the start of this month, but they could return with an improved offer as they look to replace Timo Werner following his £47.5 million ($59m) move to Chelsea.