The United Nations' Libya envoy on Wednesday condemned the killing of 12 Egyptians and three Libyan nationals in a string of incidents in the central town of Bani Walid.
"I strongly deplore these terrible killings and call on those with authority on the ground in Bani Walid to ensure that the incidents are investigated and to prevent any further killings," Martin Kobler said in a statement.
He said the incidents took place on Tuesday and Wednesday but gave no details and there was no further information from sources in the region, which is controlled by militias loyal to a new unity government.
Thousands of Egyptians live and work in neighboring Libya.
The United Nations has brokered the formation of the unity government for Libya, which has been roiled by turmoil since the 2011 ouster and killing of longtime leader Muammar Qaddafi.