by Thanaporn Promyamya

BANGKOK - Thousands of red-clad Thai protesters began to snake across Bangkok on Saturday in a festive travelling rally aimed at winning over the city's residents to their flagging anti-government campaign.

Police said around 20,000 "Red Shirts" joined the convoy across the capital in pick-up trucks, buses, cars and on motorcycles after they rejected a conditional offer of talks by Prime Minister Abhisit Vejjajiva a day earlier.

The group planned to zig-zag along 45 kilometres of Bangkok's main roads bearing flags, smiles and music, in an attempt to recuit residents to their waning rally calling for elections, now into its seventh day.

Backers of ousted premier Thaksin Shinawatra, the Reds - mainly from poor rural areas - say they are fighting Thailand 's elites in bureaucratic, military and palace circles, whom they accuse of ousting elected governments.

The protesters say Abhisit's government is illegitimate because it came to power with army backing via a December 2008 parliamentary vote, after a controversial court ruling removed Thaksin's allies.

"We will travel to find love from the people of Bangkok and to unite them with us, the poor peasants, to overthrow the elite-backed government," protest leader Veera Musikapong told the crowds before their convoy set off.

Protest numbers peaked at more than 100,000 last Sunday and have so far been peaceful, but army spokesman Colonel Sunsern Kaewkumnerd said he worried "there could be some clashes" Saturday.

The protesters picketed an army base on Monday and on Wednesday threw bags of their blood at the walls of the prime minister's family home after staging the same stunt at his office a day earlier.

But the premier has stood firm in his rejection of the protesters' demand for elections, and said talks could only take place once the rally had dispersed.

Since Thaksin was ousted, Thailand has been rocked by protests by both his supporters and his opponents, many of whom are in Bangkok and accuse him of corruption and of disloyalty to the revered royal family.