Last minute hitches are delaying the signing of a peace pact between the Democratic Republic of Congo government and armed groups in the east.
Negotiations between the Democratic Republic of Congo government and armed groups in the east to sign a peace pact have stalled in Goma.
Observers say representatives of rebel general Laurent Nkunda want small changes to an agreed draft document.
Observers said representatives of rebel general Laurent Nkunda had taken issue with parts of an agreed draft document.
The deal is to include an immediate ceasefire, the phased withdrawal of all rebel forces from North Kivu and the resettlement of thousands of villagers.
The deal would include an immediate ceasefire, the phased withdrawal of all rebel forces in North Kivu province and resettlement of thousands of villagers.
Human Rights Watch's Anneke Van Woudenberg says the deal is "historic".
Conflict in the country is estimated to have claimed 5.4m lives since 1998.
Talks involving the Dr Congo government and more than 20 rebel groups have been under way for more than two weeks and sponsored by the United States, the European Union and the African Union.
The deal aims to end months of bloody conflict around the town of Goma, which has driven over 450,000 people from their homes in the last year.
More than five million people have died in the central African country in the past decade from war and related crises, an aid agency survey suggests.
The International Rescue Committee says 45,000 people are dying every month - a total of 5.4 million dead since 1998 surpassing any conflict since World War II, it says.
Warrant
Journalist Justin Dralaze at the conference told the BBC the signing ceremony in the eastern city of Goma has also been temporarily delayed by the Mai Mai militia, which is made up of seven groups, as one of them is unhappy about disarming.
But he says a Mai Mai spokesman for the other six groups told him the dissenting group will be dropped from the negotiations as it was "insignificant".
The different factions had said they were ready to demobilise after seeing the peace deal on Monday but then disagreements emerged.
Observers say there is still a good chance the agreement will be signed later on Tuesday.
In addition to Gen Nkunda's issues with the deal, there were objections to disarming from one of seven groups that make up the Mai Mai militia.
The deal is set to give amnesty to all fighting groups, but it is not clear what will happen to Mr Nkunda.
Talks involving the DR Congo government and more than 20 rebel groups have been under way for more than two weeks.
The conference is being sponsored by the United States, the European Union and the African Union.
The deal aims to end months of bloody conflict around the eastern city of Goma, which has driven close to half a million people from their homes in the last year.
War and related crises in the central African country is claiming 45,000 lives a month, according to an aid agency.
The International Rescue Committee says the death toll in the past decade has surpassed any conflict since World War II.
The deal would grant amnesty to all fighting groups, but it is not clear what will happen to Mr Nkunda, who has not attended the talks.
There has been talk that Gen Nkunda could be integrated into the army or sent into exile.
There has been talk that Gen Nkunda could be integrated into the army or sent into exile.
He leads the main rebel movement in the area and his forces repulsed a major government offensive last December.
He leads the main rebel movement in the area and his forces repulsed a major government offensive last December.
The government has issued an international arrest warrant against Gen Nkunda, for alleged war crimes committed by his forces.
The government has issued an international arrest warrant against Gen Nkunda, for alleged war crimes committed by his forces.
The renegade general claims his forces are protecting ethnic Tutsis in North Kivu province from Rwandan Hutu rebels - both Interahamwe militia and former Rwandan armed forces - who have lived in eastern DR Congo since the Rwandan genocide in 1994.
He claims his forces are protecting ethnic Tutsis in North Kivu from Rwandan Hutu rebels, who have lived in eastern DR Congo since the Rwandan genocide in 1994.
Some of these Hutu fighters now form the Democratic Front for the Liberation of Rwanda (FDLR) rebel group.
Mr Dralaze says it is also not clear whether the issue of the FDLR and Interahamwe is going to be dealt with in the peace agreement.
Many groups, he says, want these militia to be disarmed and returned to Rwanda as they do not believe the Congolese army will protect their communities.
The Interahamwe were supposed to be disarmed under the terms of the 2002 peace deal which ended DR Congo's five-year civil war.
Aid
President Joseph Kabila is in Goma, but has not attended the talks personally, neither has Gen Nkunda.
