Sri Lankan airforce uses a crude form of chemical weapon. Empty oil barrels are filled with explosives, sawdust and pieces of rubber (old tires). These are then ignited and rolled out of cargo planes. When it explodes the flaming rubber sticks to the skin and continues to burn.
Victims of Chemical weapon attacks	The bombs - oil drums filled with gelignite or flammable gas and rubber tubes, which stick to the skin like napalm - have no ballistic stability. - The London Independent 13 February 1991
	After the government forces took control of a small island off the Jaffna peninsula 210 Tamils have disappeared and 365 persons have been massacred. - Statement of a non-governmental organization at UN Commission on Human Rights (48th Session January 1992)
	Victims were reportedly shot, bayoneted, stabbed or hacked to death; some were said by witnesses to have been buried alive. - Amnesty International Annual Report 1991