A thousand-strong force from the Hazara region in the centre of Afghanistan is camped half a day's drive from the Northern Alliance-controlled capital, Kabul.
The Hazaras, who form about 20% of the population, say they want to protect the Hazara community of the city and will only enter Kabul in co-operation with the Northern Alliance.
But they are equipped with weapons such as rocket-propelled grenades and heavy machine guns, which are far more than they need for a light security role.
Other groups have also been staking their claim in Kabul.
Factionalism fear
Shia Muslim leader, Saeed Anwari has been holding talks with Northern Alliance leader Mohammad Fahim.
Meanwhile, the Northern Alliance's political leader, Burhanuddin Rabbani, who is still recognised by the UN as president of Afghanistan, is still to arrive in Kabul. His interior minister denied a report by the Russian news agency Interfax on Thursday that Mr Rabbani had gone to the capital.
And around the eastern city of Jalalabad, men loyal to Yunus Khalis, a mujahideen party leader who has been largely silent for years, are now staking a claim in areas where they once fought Soviet troops.
Mr Khalis is not allied to the Northern Alliance, and the re-emergence of such independent operators is a worrying sign of the factionalism which Afghanistan could so easily fall into once more.
It is against this background that the American-led coalition is planning to send forces into Afghanistan.
The UN is trying at speed to arrange a meeting between all the Afghan factions, to discuss the formation of a broad-based transitional government for the country.