Turkey has not reached a new agreement to let the United States use its Incirlik air base in the fight against Islamic State militants, and talks are continuing on the subject, sources at the Turkish prime minister's office said on Monday.

Turkey had reached an agreement with Washington on the training of Syrian rebels, the sources told reporters, without saying who would train the insurgents or where.

The comments come after U.S. National Security Adviser Susan Rice said Turkey had agreed to let forces from a U.S.-led military coalition use its bases for activities inside Iraq and Syria and to train moderate Syrian rebels.