Three people were killed following suicide attackers hitting the headquarters of Libya's foreign ministry in Tripoli on Tuesday, according to Libyan security officials.
They say a second suicide bomber was shot dead by guards before he could detonate his explosive vest.
The officials, who spoke on condition of anonymity because they were not authorized to brief the media, say at least seven other people were wounded in Tuesday’s attack.
No one immediately claimed the attack, which bore the hallmarks of ISIS.
Libya has been a haven for extremists since a 2011 uprising toppled dictator Moammar Gadhafi. The country is split between rival governments, each backed by an array of local militias.