Rangers manager Ally McCoist has stepped up plans to boost his squad this month by making a bid to sign Swedish midfielder Mervan Celik and offering a trial to Estonian defender Enar Jaager.
The 21-year-old Celik is a free agent after his contract with Gothenburg club GAIS came to an end and has also been linked with Turkish side Gaziantepspor.
McCoist said: "He is a player we have been looking at for a good while now and we have been in touch with his agent. He's a young player we have looked at in recent months and he has impressed us.
"He's one that we would like to come here, that's for sure. We have made an offer to the player's agent and we are just waiting on feedback and hopefully that can be agreed."
Experienced right-back Jaager arrives in Glasgow for a trial next week as McCoist seeks cover for injured duo Steven Whittaker and Kirk Broadfoot.
He said: "We are bringing the Estonian lad on trial on Monday for a week. He has been playing in Norway at a good standard and has 70, 80 caps for Estonia.
"He's keen to come in and we are very keen to have him. We'll both have a look at each other on Monday.
Rangers have also made St Johnstone striker Francisco Sandaza a pre-contract offer and have alerted the Perth club to their interest.
McCoist said: "I spoke to (St Johnstone manager) Steve Lomas this morning just to let him know that we have put a pre-contract bid in for the end of the season when his contract is up."
"Maurice has become a very important part of the team and the squad. He has been an integral part of the success in recent years and, from my point of view, we like to keep those players.''