Some 200 people in a camp in southeast Tunisia for those who fled the Libya conflict in 2011 will be evicted Sunday when the U.N. refugee agency closes it, an NGO said Thursday.

"They are pushing the refugees out of the camp, they are closing it. We condemn the lack of humanitarian aid, the lack of security, the lack of resettlement," Nicanor Haon, with the Boats 4 People NGO, told a news conference.

Libya's Defense Minister Mohammed al-Barghathi is to be replaced, Prime Minister Ali Zeidan said on Thursday, the day after deadly clashes between armed groups in Tripoli.

"The defense minister will be thanked and we are going to name a new minister," Zeidan said in a speech.

Three car bombs exploded Wednesday in Sebha, southern Libya, leaving at least one person dead, local officials said.

"Three car bombs exploded in three different districts within half an hour," local town council member Ayoub al-Zarrouk told Agence France Presse, saying there was at least one known fatality.

Fighting erupted in the Libyan capital on Wednesday when gunmen from the western city of Zintan tried to free five comrades seized by former rebels, a security source told Agence Franc Presse.

The clashes with small arms and heavy weapons broke out in the Abu Slim area near central Tripoli, an AFP journalist and witnesses said.

A Libyan army officer died on Wednesday after a bomb placed in his official vehicle exploded in the restive eastern city of Benghazi, medical and security sources said.

The attack occurred a day after gunmen killed six soldiers at a checkpoint south of Sirte, the hometown of Moammar Gadhafi, highlighting the continuing insecurity in Libya since the 2011 revolution that ousted and killed the long-time dictator.

Independent MP Nouri Bousahmein, a member of Libya's Berber minority, was elected on Tuesday as head of the General National Congress (GNC), making him the country's interim leader.

Bousahmein, the first Berber to hold such a senior post in Libya, replaces Mohammed Megaryef, who stepped down after a law was adopted banning from politics those who served under ousted dictator Moammar Gadhafi.

Unknown gunmen launched a dawn attack on Tuesday on a Libyan army checkpoint south of Sirte, the home town of former dictator Moammar Gadhafi, killing six soldiers, a military officer said.

"An attack at dawn Tuesday against a checkpoint of the army in the town of Khuchum al-Kheil, south of Sirte, killed six soldiers who were on guard duty," local military officer Khaled al-Akari was quoted as saying by Lana news agency.

The U.N. Security Council on Friday condemned what it said were arbitrary arrests and torture in Libya as it struggles with a transition to full democracy after the overthrow and death of Moammar Gadhafi.

In a statement approved by all 15 members, the council said thousands of people are being detained outside the authority of the state and without access to due process.

Amnesty International on Thursday called on Libya to take immediate action to bring an end to the "deplorable conditions" endured by thousands of would-be migrants, refugees and asylum-seekers, including many children.

The human rights watchdog also appealed to the European Union, which it said was assisting Libya to curb EU-bound "illegal" migrants, to ensure its drive to halt them does not worsen the situation.

The new U.S. ambassador to Libya arrived in Tripoli on Wednesday, an embassy source said, nine months after her predecessor and three other Americans were killed in an Islamist attack in Benghazi.

Career diplomat Deborah Jones will present her credentials on Thursday to the General National Congress, Libya's highest political and legislative authority, state news agency LANA said.