Delegates for Libya’s rival government in Tripoli will hold off joining peace talks that were due to start on Thursday until they manage to form a new team following the resignation of a senior negotiator, a representative said. The group did not say how long it might be until they could take part in the U.N.-backed negotiations in Morocco set up to try and end months of conflict with a separate internationally recognised government. The announcement was the latest in a series of hold-ups over the talks, which Western officials say are the only hope of halting the fighting that has brought Libya to its knees in the four years since the overthrow of Muammar Gaddafi. Islamist militants, including Islamic State, have also take advantage of the chaos to gain ground in the north African oil producer. A senior member of the Tripoli delegation quit on Wednesday following what his group described as differences with the head of the Tripoli parliament over the talks.