Extra police were deployed in and around Lumpini Park on Saturday ahead of a political rally by the Democrat Party.

Pol Lt Col Ratthawut Jiamsripong, deputy chief at Lumpini police station, said a number of traffic police were also deployed to reduce congestion in the area.

The opposition Democrat Party intends to use the rally to provide facts about the military crackdown against red-shirt protesters in May 2010 when the party was in government.

Democrat supporters at Democracy Monument greet the "men in black" caravan staged to publisise Saturday's rally.

Members also say they intend to shed more light on the mysterious "men in black", who had been linked to the red-shirt United Front for Democracy against ictatorship.

Pol Lt Col Ratthawut said intelligence reports confirmed that no other political groups intended to turn out to counter the planned rally.

The Democrats on Friday staged a "men in black" caravan to highlight the involvement of the armed men in the 2010 red-shirt rallies.

A group led by MPs Tankhun Jitt-itsara and Boonyod Sukthinthai made five stops along the route where the men in black were reportedly sighted during the April-May rallies.

The recent report by the Truth for Reconciliation Commission (TRC) lent weight to the role played by the men in black in the anti-government protests. It also said the government of the day had to bear responsibility for some of the events.

Army chief Gen Prayuth Chan-ocha said on Friday that the army had information about the black-clad men who attacked security forces on April 10, 2010.

However, he said the information should be verified as the judicial process takes it course instead of being used to trade accusations.