Rebels from Sudan's Darfur region have attacked an oil field in the neighboring region of Kordofan.
The rebel National Redemption Front says its fighters captured the Abu Jabra oil field on Sunday. In a statement, the group says it destroyed a government garrison and seized a substantial number of weapons and vehicles.
However, Sudanese military spokesmen say the attack was repelled and government forces are in control of the oil field.
The attack was a rare extension of the fighting in Darfur, where rebels have been battling government forces and Arab militias since 2003.
Also Monday, former Darfur rebel leader and current presidential adviser Minni Minnawi accused Sudan's government of rearming the Arab militias, known as Janjaweed. Khartoum has denied any links to the militias.
Minnawi became an adviser to Sudanese President Omar al-Bashir under the peace agreement his rebel group signed with the government in May. Other Darfur rebel groups have refused to sign.
Sudan is resisting pressure to allow U.N. peacekeepers into the troubled region. An African Union force has been unable to stop fighting and violence that have killed an estimated 200,000 people, and displaced some two million others from their homes.
Some information for this report was provided by AFP and AP.