In Myanmar, people are mourning after the country's deadliest day since the military coup in February.
The military has intensified its crackdown on protesters.
A local human rights group says 114 people were killed on Saturday.
A large crowd gathered at a funeral for a 13-year-old boy on Sunday. They paid their respects with the three-fingered salute symbolizing resistance to the coup.
Local media reported the boy was playing near his home in Yangon when he was shot by security forces.
The Assistance Association for Political Prisoners says more than 450 people have been killed in the violence since the military takeover.
An ethnic organization in southeastern Karen State says more than 3,000 people have begun fleeing toward neighboring Thailand due to military air strikes.
State-run TV had reported on Sunday night that a militant force attacked a military post on Saturday. It was seen as an admission that the attack was carried out by an ethnic Karen armed group.
The UN special advisor on preventing genocide and the UN human rights chief said the international community has a responsibility to protect the people of Myanmar. They condemned the security forces' actions as "cowardly" and "brutal."
The US government is working on a plan to slap additional sanctions on Myanmar.
US President Joe Biden said, " It's terrible, it's absolutely outrageous. "
Defense chiefs from 12 countries, including the US, the UK and Japan, said in statement that "a professional military is responsible for protecting -- not harming -- the people it serves."