Turkish European Affairs Minister Volkan Bozkir is holding talks with senior European Union officials to try to end an impasse over part of the EU's migrant deal with Turkey.

Bozkir meets Friday with the EU's enlargement commissioner and foreign policy chief amid a standoff over whether Turkey should modify its anti-terror laws to secure visa-free travel in Europe for its citizens.

Bozkir said Thursday that "if there is a difficulty in this particular element then perhaps all of the elements of the package we have discussed and decided in the last months will be at stake."

The visa waiver is an incentive — along with up to 6 billion euros ($6.8 billion) and fast-track EU membership talks — for Turkey to stop migrants reaching Europe and take back thousands more.