"Fresh violence today (Tuesday) included helicopter gunship bombings by the Sudanese government and Janjaweed attacks in South Darfur. The violence has already led to more displacement," the UN Office for the Coordination of Humanitarian Affairs (OCHA) said in a statement from Geneva.
"Janjaweed attacks on internally displaced persons in and around IDP settlements continue to be reported in all three Darfur states," it added.
Civilians have previously said Sudan used helicopters and other military aircraft to attack villages in Darfur, but there have been fewer reports of such attacks since rebels and the Government signed a cease-fire in April.
Under a joint plan agreed with the United Nations last week, Sudan said it would establish safe areas for the displaced and cease military operations by its troops and rebels there.
Despite recent pledges to cooperate to end the humanitarian crisis the UN has called the worst in the world, the UN said the Sudanese Government has hampered access to hungry Darfuris by restricting relief flights and causing "major delays" in deployment of aid workers.
The world body also said Sudanese authorities were pressuring traumatised refugees to return to unsafe villages.
"We have interviewed people in hospital who tell us they have gone back to the villages, believing the government commitment, and have been shot by Janjaweed raiders," said United Nations High Commissioner for Refugees spokesman Peter Kessler in Geneva.
"We can't tell if people are being led into a trap - we would hope not," he added.
By In Solidarity 11 August 04
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