UNITED NATIONS, Jan 9 (Reuters) - It was rebel forces and not Sudanese government soldiers who attacked a clearly marked U.N./African Union supply convoy in Sudan's war-torn Darfur region this week, Sudan's U.N. ambassador said on Wednesday.

"They were not the government," Ambassador Abdelmahmoud Abdelhalim Mohamed told reporters before a meeting of the U.N. Security Council on the situation in Darfur.

"The rebels did that. No doubt about it."

He accused the Justice and Equality Movement, a Sudanese rebel group, of carrying out the attack late on Monday.

A spokeswoman for U.N. Secretary-General Ban Ki-moon said on Tuesday that "elements of the Sudanese armed forces" had attacked the convoy from the UN/AU Mission in Darfur, known as UNAMID.

UNAMID said one civilian Sudanese driver was in critical condition after being shot seven times in the attack. (Reporting by Louis Charbonneau; Editing by Doina Chiacu)