Tens of thousands of civilians have already fled the remote and rugged Kokang area of northeastern Shan State over the last 10 days, with at least 30,000 crossing the border into China.
Local aid groups have officially suspended rescue convoys to and around the flashpoint town of Laukkai, where a series of surprise attacks by ethnic Kokang rebels last week sparked the flare up of violence.
"We still do not know exactly how many people are still trapped in the Laukkai region... But we evacuated around 30 people from there on Wednesday," a Myanmar Red Cross member told AFP in the Shan town of Lashio, some 140 kilometres (85 miles) south of Laukkai.
"We are asking both sides to keep a ceasefire for a few days, so we can help to evacuate people. Currently, even our Red Cross logo cannot help to protect people. It's really sad.