Some 100,000 Indian Communist Party members took to the streets of Calcutta on Thursday protesting the death sentence handed to former Iraqi dictator Saddam Hussein.
The protesters called Hussein's trial a farce and condemned US President George W. Bush and US policies in the Mideast.
An Iraqi court earlier this month convicted Saddam for the killings of some 150 Shiite Muslims after an assassination attempt against him in 1982.
Addressing the rally, Biman Bose, a party leader, accused the US of repeatedly violating the sovereignty of developing nations.
Protesters held posters reading "Down with George Bush" and "Bush is the greatest enemy to humanity." Calcutta's police control room estimated the crowd at 100,000 people.