This from Amnesty International:
On Saturday, April 10, 2010, Thai state security forces began a crackdown against red-shirted protestors of the United Front of Democracy Against Dictatorship in Bangkok. Reports indicate that security forces used water cannons, tear gas, rubber bullets, and live ammunition against protestors. As of April 13, 2010, a reported 21 people,including four security agents, were killed and over 800 injured. Call on the authorities to refrain from using unnecessary or excessive force against protesters.
Sign the petition here.