MONYWA, Burma (AP) — Security forces used water cannons and other methods to crack down on protesters occupying a copper mine in Burma hours before opposition leader Aung San Suu Kyi was expected to visit there to hear the grievances.

Burma mine Protest

Protesting Buddhist monks occupy the office entrance to the Chinese mine company Wan Bao Co. Ltd. in Letpadaung mine, Monywa township, northwestern Burma. Pic: AP.

Unexplained fires engulfed protest camps after the Thursday morning raid at the Letpadaung mine in northwestern Burma. Several protesters said dozens of Buddhist monks and villagers were injured.

The government had ordered protesters to evacuate the mine by Wednesday or face legal action. The protesters want the project halted because they say it is causing environmental, social and health problems.

Suu Kyi is scheduled to visit the mine around midday Thursday to hear the protesters’ concerns.