A gun battle erupted on Sunday between Myanmar security forces and the Northern Alliance at a town on the border with China, Myanmar media said.
The fighting at Muse, one of the main crossing points to China, was one of the latest to hit Myanmar since the coup. There were no immediate reports of casualties.
One of the groups in the alliance, the Kachin Independence Army, also attacked a military post at Hkamti, Sagaing Division nearly 320 km (200 miles) from Muse and closer to the Indian border on the other side of the country on Saturday, Reuters reported.