At least 30 people, including five civilians and five traffic police, were killed Monday in a "surprise" attack authorities blamed on an ethnic Kokang rebel group in the small town of Laukkai near Myanmar's southeastern border with China.
Rebels from the Myanmar Nationalities Democratic Alliance Army (MNDAA) launched an attack early Monday against police and military posts, according to Suu Kyi's office. It came one day after MNDAA attacks in Laukkai-the administrative capital of the ethnic Kokang region of Shan State-left at least 10 dead.
Many died and tens of thousands fled during that fighting, which also spilled over into China's territory and resulted in the death of five of its people, angering Beijing. China urged both the parties to resolve their disputes through dialogue and consultations.
Chinese foreign spokesman Geng Shuang said aid was being offered to those looking to "temporarily avoid the war", and called for an immediate ceasefire, adding that China supported Myanmar's peace process.
Following closely the military conflict at the border area of China- Myanmar in the Kokang region, China on Tuesday urges the concerned parties to maintain conducive to peace.
"Almost all residents from Laukkai town are fleeing", said Brigadier General Nyo Tun Aung from the Arakan Army (AA).
"According to initial information, many innocent civilians including a primary school teacher. were killed because of attacks by the MNDAA armed group", the office of Myanmar's de facto leader, Aung San Suu Kyi, said in a statement.
The latest clashes are in Shan, a northeastern state which has seen repeated bouts of fighting between the army and ethnic minority groups since November, undercutting a government peace bid.
The attack came after the Nobel Peace Prize victor met a delegation of ethnic armed groups last week to convince them to participate in a major peace conference.
Myanmar nationals from other parts of the country and Chinese who work in the city close to the border with China have been trying to return home to safety, they said.
Observers believe Beijing holds some sway over the ethnic fighters and has a key role to play in peace talks that Myanmar's de facto leader Ms Suu Kyi has tried to revive since coming to power past year.
"The government military has been asking us to abandon our weapons for a long time, but we stand firm on resolving political conflicts through political means instead of abandoning our weapons", he said.
An army source requesting anonymity said "about 7,000 local residents are fleeing to the China side because of fighting".