Central African Republic's interim President Michel Djotodia will face pressure to step down at a summit of regional leaders later amid frustration at his failure to quell his country's religious violence.
Political sources in Bangui and French diplomatic sources said Mr Djotodia would announce his departure at the meeting of the Economic Community of Central African States (CEEAC).
He may signal his plan to quite in the Chadian capital N'Djamena or shortly afterwards on his return to Bangui.
A spokesman for Mr Djotodia, who seized power in March at the head of the Seleka rebels, denied any such plan.
But CEEAC Secretary General Ahmat Allami said the group would tell Djotodia that his transitional government was not working.
French and African troops have struggled to stop tit-for-tat violence between Muslim Seleka rebels and Christian militias in which more than 1,000 people have died.
"If you are incapable, if you are powerless in the face of the situation, make way for others who can do a better job," Mr Allami said in N'Djamena.
"It may happen that CEEAC is overwhelmed and cannot continue to support the transition."
"That does not mean that CEEAC can proceed to simply change the head of state. Central African Republic is not a state under tutelage," he said.
Diplomatic sources said that EU officials have proposed that the it move quickly and send a force of at least battalion-strength, roughly 700 to 1,000 soldiers, to the west of the country or the capital.
The news will please France, which has urged allies to do more to bolster the 1,600 troops it deployed last month.
But it is too early to say how much support there is among EU member governments for sending a military mission that might put EU soldiers' lives at risk.
A source close to Djotodia told Reuters earlier that Central African leaders, led by Chad's Idriss Deby, had run out of patience with Djotodia's failure to end months of violence after his Seleka rebels seized power in March.
"It's finished for him now," said the source. French sources said Djotodia might wait until he returned to Bangui before stepping down.