Fighting raged in the remote Kokang region of Shan state where conflict erupted on February 9 when insurgent attacks on soldiers triggered a military onslaught, prompting at least 30,000 civilians to escape into bordering China.
In the first press conference since clashes began, defence ministry spokesman Lieutenant General Mya Htun Oo said the conflict had killed 61 military and police officers and around 72 insurgents.
He did not provide figures on civilian deaths in and around Laukkai town, where the conflict has centred, as efforts to evacuate communities remain hampered by an attack Tuesday on a local Red Cross convoy which wounded two aid workers.
The spokesman blamed the attack on the rebels: "Our military only provides protection to civilian convoys... We are going to take action against Kokang rebels' offence."
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The ethnically Chinese Kokang rebels or National Democratic Alliance Army (MNDAA), who are fighting for regional autonomy, have denied attacking the convoy.
Myanmar's quasi-civilian government has put the ceasefire agreement at the heart of its reforms as the nation prepares for a general election later this year.
But the fighting has raised fears those efforts are unravelling.