KHARTOUM, Sudan (AP) — A Darfur rebel group is accusing Sudanese troops of attacking an area in northern Darfur despite a government-declared cease-fire.

The Justice and Equality Movement says the group repelled an attack Saturday from government vehicles backed by helicopters and suffered no losses. Rebel spokesman Ahmed Hussein says the attack indicates the cease-fire is a “big lie.”

A military spokesman denies any raid, but says army forces intervened to stop an attack against a relief convoy.

President Omar al-Bashir announced the cease-fire Wednesday.

Up to 300,000 people have been killed and 2.5 million driven from their homes in the vast region of western Sudan since fighting erupted in early 2003.