The increased indiscriminate attacks by Myanmar's military in the country's eastern region have killed and displaced tens of thousands with air attacks constituting "war crimes."
The 27-member bloc's plea came as a response to the brutal killing of over 30 people in Kayah state by the Myanmar army last week.
The charity said two of its staff members were among 30 people killed in Kayah state, where pro-democracy rebels have been fighting the military.
The violent photos circulated online show the remains of bodies on burnt-out truckbeds near Mo So village of Hpruso town in eastern Myanmar.
Myanmar military is fighting ill-armed volunteers, aligned with anti-coup lawmakers, in Kayah State near the Thai border, with locals accusing the army of firing artillery shells that landed near villages.
Recent clashes and "indiscriminate attacks by security forces against civilian areas" have forced the population to flee their homes in eastern Kayah state near the Thai border, the international body's Myanmar office says.
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