"A package has been put together and presented to the parties, but there are no takers yet," said a senior member of a US-led diplomatic team at Darfur peace talks in Abuja - Reuters
Estelle Shirbon reported:
"What we are saying to the (rebels) is, 'Please take it and then we can put pressure on the government'," said the diplomat, requesting anonymity.
He said it was possible the parties would agree to the new peace package at a meeting due to take place at the Nigerian presidential villa but there was no certainty.
The new deadline is midnight (2300 GMT) on Thursday.
A senior AU source said the midnight deadline was likely to slip but only for discussions to continue late into the night.
"The clock will stop at midnight but this is it. There is no extension," he said.