PARIS (Reuters) - Airbus is poised to delay the entry into service of a freighter version of its A350 jet by up to a year following production and supply chain delays, two industry sources said.

The delay could be announced as early as Thursday when the European planemaker posts its annual results, they said, asking not to be named because the discussions remain confidential.

Airbus declined to comment. Reuters reported earlier that Airbus looked increasingly unlikely to increase production of its broader A350 series for at least the rest of this year.