Rebels in Sudan's western Darfur region said on Tuesday they had seized control of a town from Sudanese government troops, part of their campaign to topple President Omar Hassan al-Bashir's government.

"Our forces entered Girayda, south of Nyala, and took over the garrison completely," Abdullah Mursal, spokesman for the Sudan Liberation Army (SLA) faction led by Minni Minnawi, said.

"We want to bring the downfall of the regime. And to do that we have to take over cities before we reach Khartoum," he added.

Mursal said the rebels OAKLEY PIT BOSS POLARIZED SUNGLASSES, who included fighters from a faction led by Abdelwahid Nour, had captured two armored personnel carriers, some Landcruisers and weaponry.

Four rebels had been wounded in the fighting, he added.

Sudan's army spokesman could not be immediately reached for comment.

The two rebel factions involved in the attack formed an alliance - called the Sudanese Revolutionary Front - with other fighters in Sudan's southern border states late last year.

Sudan accuses South Sudan - which became independent from Khartoum last year after a protracted civil war - of secretly backing some rebels, an allegation Juba denies.

The two former civil war foes have clashed repeatedly in the last month along their shared border and remain locked in a conflict over oil revenues, border demarcation and citizenship that has threatened to escalate into a full-blown war.

Yacoub al-Malik, a lawmaker representing the town of Girayda, said Minnawi's troops had stormed the town in a convoy of 37 cars.

"There was a small group of army troops in the area and they were weak compared to the aggressor troops," Malik said.

"They carried out killings ... and stole civilians' property," he said, adding that the rebels had also destroyed telecommunications towers.

The African Union/U.N. joint peacekeeping mission (UNAMID), which has a large presence in Darfur, said its personnel had relocated to a camp just outside Girayda.

"The U.N. team is on high alert. Most U.N. and non-U.N. international stuff have been relocated to a compound site just outside of Girayda OAKLEY POLARIZED MONSTER PUP SUNGLASSES," UNAMID spokesman Chris Cycmanick said.

Violence has subsided since mostly African insurgents in Darfur took up arms against the Arab-dominated government in 2003, but rebel and tribal fighting and banditry still roils the territory.