A horde of red-shirted demonstrators began to march by foot at 4:15 p.m. Tuesday from Phan Fah Bridge, the main rally site, toward the Government House to execute their high-profiled plan of blood pooring.

The blood is donated earlier in the day by the red-shirts who are staging a mass rally in an effort to topple the government.

Since 8 o'clock in the morning, the red-clad supporters of the anti-government United Front of Democracy against Dictatorship ( UDD) have queued up to volunteer to donate 10 cc blood each.

The process was facilitated by medical teams from some local hospitals.

Nattawut Saikua, one of the red-shirts leaders, said Monday afternoon that the blood, taken from 100,000 protesters including the red-shirts leaders, will be scattered around the Government House as a measure to step up pressure on the government during their mass rally.

The red-shirts movement has staged the rally to topple the Abhisit administration since March 12, urging the Prime Minister to dissolve the parliament and call a fresh election.

The blood scattering will be a symbolic action, making the cabinet ministers have to walk over the protesters' blood when they enter the Government House to work, Nattawut said.