The office of the International Committee of the Red Cross in Libya's western city of Misrata was attacked Tuesday by unknown armed men, a spokesperson said, adding a Libyan national living next door was injured.
Committee spokesperson Sumia Beltwefa said that the attack had caused damage to the office building.
"We do not know if the missile was carried on the shoulder or a bomb placed next to the building," she told Xinhua.
She added that a Libyan living next to the office building was injured in the attack, while all the Red Cross's 30 workers were not hurt and are safe now.
The spokeswomen meanwhile stressed that her committee's work in matters of humanitarian and relief "has nothing to do with religion or politics at all."
The incident was the latest of a string of anti-foreigners assaults recently in Libya.
On May 22, another Red Cross's office in the eastern city of Benghazi was attacked. An Islamic militant group calling itself " Brigades captive Omar Abdel-Rahman" later claimed responsibility and even posted a video episode on its Facebook page about the process of the attack.
On Monday, a convoy of British diplomat mission was targeted by armed men using RPGs in Benghazi and at least one security escort was wounded, after a bomb attack near the U.S. diplomatic mission in the same city a week ago.
The security situation in Libya, about eight months after the civil war that ended the life of former leader Muammar Gaddafi, is still unstable as tribal clashes, anti-interim government and anti- foreigners attacks are reported almost every month.
On Sunday, Libya's electoral committee announced that the forthcoming constituent assembly elections, originally set to be held later this month, are to be postponed to July 7, amid ongoing clashes between the army forces and armed groups over the weekend in the southeastern city of Kufra, which left about 20 people killed and more than 60 others injured.