Gunmen killed a French national in Libya's eastern city of Benghazi on Sunday, in the latest slaying of a foreigner in the restive area, a security source said.
In a separate incident, gunmen in Benghazi also shot and wounded an Egyptian who had been working in a grocery, and a Libyan police officer survived an assassination attempt.
The French man, Patrice Real, worked for a company upgrading a large hospital in Benghazi, which has been rocked by car bombs and assassinations amid Islamist militant activity.
'He was killed with three shots,' the source said.
France's foreign ministry issued a statement condemning the killing as 'odious and cowardly' and calling for its perpetrators to be identified.
A week ago, police found seven Egyptian Christians shot dead execution-style on a beach outside Benghazi, home to several oil firms. No one has claimed responsibility for that killing.
Most countries have closed their consulates in Benghazi and some foreign airlines have stopped flying there since the U.S. ambassador and three other Americans were killed in an Islamist militant onslaught in September 2012.
An American school teacher was also killed by gunmen in December while he was jogging in the city.
Three years after the revolution that ousted Muammar Gaddafi, Libya's weak government and army are struggling to control brigades of former rebels and Islamist militias in a country awash with weapons.
Western diplomats worry that the violence in Benghazi will spill over to the capital, Tripoli.
In January, a British man and a New Zealand woman were shot execution-style on a beach 100 km (60 miles) west of Tripoli.