Qatar is suspending its role as a mediator in talks between Israel and Hamas after concluding that the two sides are no longer negotiating in good faith, two sources familiar with the situation tell CNN.

Qatar has suspended its key mediation efforts between Hamas and Israel, it said Saturday, after growing frustration with the lack of progress on a cease-fire deal for Gaza.

The Gulf country has been working alongside the United States and Egypt for months on fruitless talks between the warring sides in Gaza and any disengagement from that process could further complicate efforts to reach a deal.