Three ethnic armed groups have continued to attack Lashio, the biggest city in Myanmar's northern Shan state, with heavy arms fired on government forces and police stations, Xinhua reported.

The attacks intitially launched Friday night by the Arakan Army (AA), Ta'ang National Liberation Army (TNLA) and Myanmar National Democratic Alliance Army (MNDAA), destroyed bridges on Hsenwi-Kunlong road and burned a petrol station on Lashio-Hsenwi road, the military said in a statement released late Saturday.

During the night, the combined armed groups also fired three rocket propelled grenades on a battalion headquarters in Kyaukme, Shan state and retreated to the west after returning fire by the Myanmar armed forces.

The groups also mined two reinforced concrete bridges of Byone Taung on Namt Slup-Kunlong road and Mantonsun on Hsenwi-Namt Slup road before dawn on Saturday.