Myanmar aircraft carried out three strikes overnight Sunday, according to Free Burma Rangers, a humanitarian relief agency that delivers medical and other assistance to villagers. The strikes severely injured one child but caused no apparent fatalities, a member of the agency said.

Thai Prime Minister Prayut Chan-ocha on Monday acknowledged the problems across his country's western border and said his government is preparing for a possible influx of people.

“We don't want to have mass migration into our territory, but we will consider human rights, too," Prayut said.

Asked about people who have already fled into Thailand, Prayut said, “We have prepared some places, but we don''t want to talk about the preparation of refugee centers at the moment. We won't go that far."

About 2,500 people, including 200 students, have crossed the Salween River into northern Thailand's Mae Hong Son province, according to Burma Free Rangers. An estimated 10,000 people are believed to be displaced in Myanmar's northern Karen state, the agency said.

Video shot Sunday shows a group of villagers, including many young children, resting in a forest clearing inside Myanmar after fleeing their homes. They carried their possessions in bundles and baskets.

The bombings may have been retaliation against the Karen National Liberation Army for having attacked and captured a Myanmar government military outpost on Saturday morning. The group is fighting for greater autonomy for the Karen people.

Leaders of the resistance to last month's military coup that toppled Myanmar's elected government are seeking to have the Karen and other ethnic groups band together and join them as allies, which would add an armed element to their struggle.

According to Thoolei News, an online site that carries official information from the Karen National Union, eight government soldiers were captured in Saturday's attack and 10 were killed. The report said one Karen guerrilla died.

The airstrikes mark an escalation in the increasingly violent crackdown by the Myanmar government against opponents of the Feb. 1 military takeover.

At least 114 people across the country were killed by security forces on Saturday alone, including several children — a toll that prompted a U.N. human rights expert to accuse the junta of committing “mass murder” and criticize the international community for not doing enough to stop it.

The U.N. Security Council is likely to hold closed consultations on the escalating situation in Myanmar, diplomats said Sunday, speaking on condition of anonymity ahead of an official announcement. The council has condemned the violence and called for a restoration of democracy, but has not yet considered possible sanctions against the military, which would require support or an abstention by Myanmar''s neighbor and friend China.

In Sunday''s bombings, Myanmar military aircraft attacked a Karen guerrilla position in an area on the Salween River in Karen state''s Mutraw district, according to workers for two humanitarian relief agencies.

Two guerrillas were killed and many more were wounded in those attacks, a member of the Free Burma Rangers said.

On Saturday night, two Myanmar military planes twice bombed Deh Bu Noh village in Mutraw district, killing at least two villagers.

The coup, which ousted the government led by Aung San Suu Kyi, reversed years of progress toward democracy after five decades of military rule. It has again made Myanmar the focus of international scrutiny as security forces have repeatedly fired into crowds of protesters.

As of Sunday, at least 459 people have been killed since the takeover, according to the Assistance Association for Political Prisoners, which has tallied deaths it was able to verify. The true toll is thought to be higher.

Funerals were held in Myanmar on Monday for those who died protesting against the coup over the weekend. In Yangon, friends and family gathered to say farewell to 49-year-old Mya Khaing, who was fatally shot on Saturday.

Friends told media that he was always at the front of protests.

As his coffin was moved toward the crematorium, mourners sang a defiant song from an earlier 1988 uprising against military rule. “There is no pardon for you till the end of the world,” the words said of the military, calling it “monsters.” “We will never forgive what you have done.”