EU foreign policy chief Catherine Ashton vigorously condemned Tuesday's bomb attack against the French embassy in Tripoli and said terrorism was one of the worst threats to international peace.
"I condemn in the strongest terms the attack against the French embassy," Ashton said in a statement.
"Terrorism constitutes one of the most serious threats to international peace and security and cannot be justified under any circumstance. Those responsible for today's attack must be brought to justice and held accountable for their acts."
"I trust that the Libyan authorities are undertaking the necessary investigations in this regard," she added.
Two French guards were hurt and the embassy badly damaged when a car bomb hit the building in the morning in the country's first attack on a foreign mission since militants stormed the US consulate in Benghazi in September.