The announcement comes a week after the group announced it would stop recruiting children under 17.

Farc leader Ivan Marquez told Colombia's Caracol Radio that 13 children under 15 are currently in their ranks.

Myanmar’s government has declared martial law in the eastern region of Kokang, after fighting broke out between the Tatmadaw and an ethnic Kokang militant group called the Myanmar National Democratic Alliance Army (MNDAA).

At least 47 Myanmar soldiers and 26 MNDAA fighters have been killed since then, according to the state-backed Global New Light of Myanmar newspaper, and thousands have fled across the border into China.

A Red Cross convoy, which was transporting displaced civilians, was attacked by unknown gunmen on Tuesday, leaving two volunteers injured.

"We haven’t had such an attack before," said Red Cross spokeswoman Shwe Cin Myint to Reuters. "This would be the very first."

The Nigerian military has taken control of a key town in Borno state, a month after Boko Haram militants captured it.

According to a military statement, Nigerian soldiers, backed by the air force, retook the town of Monguno, near the state capital Maiduguri.

The US meanwhile told the BBC it would support Nigeria with training and equipment.

Lt-Gen Steven Hummer said that US Africa Command was "ready to assist in whatever way [Nigeria] see as being practical".

The United Nations Security Council passed a resolution on Sunday calling on Houthi militants to immediately withdraw from Yemeni government offices, after they seized power and dissolved parliament earlier this month.

The resolution demands that the Houthi “immediately and unconditionally” withdraw from government institutions and warns of take "further steps" if the resolution is not implemented, as did an earlier resolution passed by the council.

It also "deplores actions taken by the Houthis to dissolve parliament and take over Yemen's government institutions, including acts of violence", reports Reuters.

Egypt has urged the international community to expand the fight against Islamic State into Libya, after 21 Egyptian Copts were beheaded by the militant group's arm in the country.

The Egyptian air force in response bombed IS targets in Libya, with President Abdel Fatah al-Sisi describing Islamic State as threat to international peace.

"What is happening in Libya is a threat to international peace and security," the president said.

The Egyptian Foreign Ministry said in a statement quoted by AP that "immediate and effective" action was needed and maintaining the status quo constituted a "clear danger".

A ceasefire between the Ukrainian government and pro-Russian separatists has come into effect from 12.01am on Sunday local time (10.01pm Saturday), though sporadic shell fire has been reported across parts of eastern Ukraine.

The Italian coastguard launched a bid to rescue more than 1,000 migrants who are stranded in the Mediterranean Sea, between Europe and North Africa.

More than 130 people have been rescued so far, but a spokesman for the coast guard in Rome told Reuters that they are certain that "more than 1,000 migrants" were at risk. The group had been travelling in dinghies off the coast of Libya in an attempt to reach Europe, before stormy weather hit them.

The rescue attempt comes after up to 300 people died on Wednesday, when boats carrying them across the Mediterranean capsized.

A Jordanian court has sentenced the deputy leader of the Muslim Brotherhood in the country to 18 months in prison, for criticising the United Arab Emirates in a Facebook post.

Zaki Bani Ersheid, who was arrested in November last year, was convicted of committing “acts harmful to the country’s relations with a friendly nation.” 

The Muslim Brotherhood said in a statement that the sentence was “politically motivated and demonstrates a deliberate escalation by the state against the Muslim Brotherhood in Jordan.” “It is a blow to freedom of speech and the rights of citizens,” added the opposition organisation.