Darfur - Sudan's government has urged peacekeepers to leave the rebel-held Darfur town of Muhajiriya, amid fears that an attack is imminent.

The town was seized by rebel forces in January, sparking fierce fighting, including air strikes.

A spokeswoman for the joint UN-African Union peacekeepers said they did not want to leave but discussions were still continuing.

The six-year conflict has left at least two million people homeless.

Tahir al-Feki, from the rebel Justice and Equality Movement, told Reuters news agency that four columns of army troops, including tanks, were approaching the town.

Reed Brody, a lawyer with Human Rights Watch, told AP the peacekeeping force, known as Unamid, should not leave the town if that would expose civilians to attack.

Unamid spokeswoman Josephine Guerrero said the peacekeepers did not want to leave.

The Unamid force remains at only about half of its planned 26,000 strength, a year after the
UN took joint control of the mission.

The recent fighting around Muhajiriya has marked an escalation in the ongoing Darfur conflict, almost six years after it began.

It comes as the International Criminal Court mulls whether to issue an arrest warrant for Sudan's President Omar al-Bashir on charges of orchestrating war crimes in Darfur.

The UN says up to 300,000 people in Darfur have died and more than 2.2 million have been displaced since the uprising against Sudan's Arab-dominated government started in February 2003.

Khartoum says just 10,000 have died. It says the scale of the suffering has been exaggerated for political reasons.