Myanmar security forces opened fire on protests against military rule on Wednesday, killing nine people, witnesses and media reported, a day after neighbouring countries called for restraint and offered to help Myanmar resolve the crisis.

The security forces resorted to live fire with little warning in several towns and cities, witnesses said, as the junta appeared more determined than ever to stamp out protests against a Feb. 1 coup that ousted the elected government of Aung San Suu Kyi.

"They marched towards us and fired tear gas, marched again and used stun grenades," Si Thu Maung, a protest leader in the central town of Myingyan, said. "Then they didn't spray us with water cannon, no warning to disperse, they just fired their guns."