CELTIC have been alerted to the availability of Austrian captain Marc Janko following his departure from Trabzonspor.
The 30 year-old is available on a free transfer having negotiated an early exit from his contract with the Turkish side.
The striker was linked with Celtic four years ago during Gordon Strachan’s reign and was given a tour of the stadium by current Celtic manager Neil Lennon.
Janko was valued at £5m in 2009 however he was convinced to stay with Salzburg by the Austrian club’s owner’s Red Bull.
The Austrian international is represented by agent Rob Jansen who has made the Parkhead club aware of his availability.
The former Salzburg player has also had spells at Porto and FC Twente and has scored 107 goals in 199 league games.
He said: “If I was to get the chance to talk to Celtic I would be interested.
“I first came to speak to them a few years ago for two days of meetings when I was at Salzburg.
“I was in Glasgow to meet Gordon Strachan in 2009 but I always remember meeting with Mr Lennon at the same time. I got on well with him.
“I was given a tour of the city, taken to the stadium which was fantastic and I could just imagine how it would be full.
“But for reasons not really to do with Celtic, more to do with the agreement I had with Salzburg, the move did not happen.
“I had already given my word to the owner of Red Bull I would stay with this club for one more season.
“After that one year I moved to Twente in Holland and had a good time and then Porto made an offer I couldn’t resist. “Unfortunately things have not worked out for me since.”