Protesters are gathering in East Timor to demand the resignation of embattled Prime Minister Mari Alkatiri.
International troops are keeping order in the capital
Hundreds have already turned up outside the government palace in Dili, which is being guarded by both national police and foreign peacekeepers.
Protesters blame Mr Alkatiri for much of the violence in the last few months, which has killed at least 21 people.
Organisers said they expected 1,000 people at the rally, and vow to stay "as long as it takes".
It was Mr Alkatiri's government that was responsible for the sacking of 600 soldiers in March, after they went on strike complaining of discrimination.
Gun battles between loyal troops and rebel soldiers then broke out, with machete-wielding youths forcing thousands to flee their homes in fear.
Protesters also allege that Mr Alkatiri formed a hit squad to kill hit his political opponents - a charge he firmly denies.
"People are coming because they know Alkatiri gave weapons to civilians to divide people and kill each other," said rally spokesman Agosto Junio.
Checking for weapons
More than 2,200 peacekeepers, from Australia, New Zealand, Malaysia and Portugal, are currently in East Timor to restore order.
They were out on the streets of Dili in force on Tuesday, in preparation for the protest, wearing full combat gear and armed with assault rifles.
They have set up checkpoints on the main roads into the city, to search people for hidden weapons.
In the last few days, rebel soldiers have begun surrendering their weapons, but peacekeepers believe there are likely to be many more in circulation in the environs of the capital.