There are reports that the Burmese Army has been supplied with mortar rounds laced with chemical weapons. This equipment is reported (according to alleged Burmese AZrmy sources) to come from North Korea.
Rebel sources report a test firing of one of these chemical rounds:
During the clash between Burmese troops and Kokang rebels also called the Myanmar National Democratic Alliance Army (MNDAA) from August 27 to 29, in rebel territory in Northeast Shan State, the Burmese Army fired the mortar once, said sources close to the MNDAA.
So far I have only seen these reports on the TaiFreedom website, but I hope that International journalists will investigate, as the Burmese regime has a history of flirting with chemical weapons.