Clashes rocked libya's capital early on Tuesday as the parliament-appointed prime minister, Fathi Bashagha, tried to take over government there but was forced back out by a rival administration that refuses to cede power.
Bashagha entered Tripoli overnight after two months of stalemate between libya's rival administrations, but withdrew hours later as fighting broke out, his office said.
The crisis risks plunging libya back into prolonged fighting after two years of comparative peace, or returning it to partition between the eastern-backed government of Bashagha and a Tripoli administration under Abdulhamid al-Dbeibah.
Political deadlock has already led to a partial blockade of libya's oil facilities, cutting its main source of foreign revenue by half. Diplomacy to resolve the crisis or lay the ground for new elections is making slow progress.
The sound of heavy weapons and automatic gunfire reverberated across Tripoli on Tuesday morning. Schools were cancelled and the normally heavy rush hour traffic was sparse, but the clashes stopped after Bashagha's withdrawal.
"I don't think things will just return to being cool and static and relaxed," said libya expert Jalel Harchaoui, adding that Dbeibah would likely try to put more pressure on the factions in Tripoli allied to Bashagha.
However, wider conflict seemed unlikely, he said, given Bashagha's rapid withdrawal from Tripoli.
Later on Tuesday, Dbeibah toured the areas where the clashes had taken place, speaking to passers by. In a statement, his government called Bashagha's convoy "an outlawed armed group trying to sneak into the capital under darkness".
Bashagha on Twitter accused Dbeibah's allied forces of a "dangerous military escalation" and said their actions showed Dbeibah's government would be unable to hold any credible election.
With neither side apparently able to establish a decisive military advantage across the country, libya seems set for a longer period of deadlock, with Dbeibah firmly entrenched in Tripoli and his foes unable to take it.
That may prolong the shutdown of major oil facilities by forces in eastern libya tied to commander Khalifa Haftar, who backs Bashagha.
