TAIPEI/MONTREAL, Sept 23 (Reuters) - Taiwan has not been invited to the assembly meeting of a United Nations aviation agency, the latest sign of the pressure China is bringing to bear on the new independence-leaning government of the self-ruled island it views as a renegade province.

SINGAPORE (Reuters) - Oil prices eased on Friday, pulled down by a technical sell-off following two sessions of strong rises and on caution ahead of a gathering of OPEC ministers next week in Algeria to discuss possible production cooperation to rein in global oversupply.

LIBREVILLE, Sept 22 (Reuters) - Gabon's Constitutional Court said it would issue a ruling on Friday on an election that opposition leader Jean Ping said was rigged to give President Ali Bongo victory.

ERBIL, Iraq, Sept 22 (Reuters) - Islamic State militants are expected to fight bitterly to hold onto their de-facto Iraqi capital, and the battle to retake Mosul will likely be a bloody one, a German major helping train local forces said on Thursday.

LIBREVILLE (Reuters) - Gabon's Constitutional Court began hearing arguments on Thursday in advance of its ruling on an election that opposition leader Jean Ping said was rigged to give President Ali Bongo victory.