"The Janjaweed attacked villages in Nena yesterday and raped two girls ... aged 16 and 18," said Jar el-Naby, a rebel commander in North Darfur.
"Government troops are also mobilising in this area, and we are prepared for an attack," Naby said.
Nena is about 100 kilometres northwest of el-Fasher, Darfur's main town. Janjaweed, derived loosely from the Arabic for devils on horseback, are militias accused of a campaign of rape, pillage and murder which Washington calls genocide.
Khartoum denies genocide and any links to Janjaweed, calling them bandits.
One African Union source confirmed the heavy build-up of troops around the area in North Darfur, which has seen fighting between the rebels and government over the past few months.
Rights group Amnesty International said in a press release that thousands of civilians in neighbouring eastern Chad had fled cross-border Janjaweed attacks.
"The new wave of attacks across the Chad/Sudan border started on 3 October and have continued since then," Amnesty said in a press release on Saturday. "Dozens of people have been killed and some 3,000 have fled in the past week." It called on the Chadian government to deploy more troops along the long and porous border until U.N. peacekeepers deployed in Darfur.
BBC World Service broadcasts to Juba in Southern Sudan and surrounding areas in Arabic on 90.0 FM and in English on 88.2 FM. In Northern Sudan: Khartoum 91.0 FM, Al Ubayyid 91.0 FM, Port Sudan 91.0 FM and Wad Madani 91.5 FM.
“Violence will bring no victory. For the sake of the Darfur civilians, all parties to the conflict have to stop resorting to violence. This is the absolute priority.” - Luis Moreno-Ocampo, Prosecutor of the International Criminal Court, 05 June 2009
"APPREHENSION" by Rob Rooker. Painted on a wall in Maridi, Sudan. The image is of a young Nuer boy looking up among a crowd of people. Click on image for more details. Cards & prints of Rob's paintings can be purchased online at Imagekind.com