BP chief executive Bob Dudley said on Friday talks were ongoing about its planned share swap with Russian group Rosneft and he was optimistic about a resolution.

I think there is always lots of discussion going on and I think we will find a resolution to this over time, Dudley told Reuters in at interview on the sidelines of a conference in St Gallen.

The $18 billion share swap agreement expires on Monday, with some analysts believing the deadline to complete the swap, which was previously blocked by a court injunction, could be extended.

(Reporting by Caroline Copley; Writing by Tom Bergin; Editing by Dan Lalor)