Schoolchildren screamed as bombs hit the border between Thailand and Myanmar.

Footage shows terrified youngsters shrieking as a blast rattled a school in northern Tak province on February 27.

Authorities said the skirmish between the Burmese military and anti-junta forces erupted at around 4:30 am when the Karen National Liberation Army launched a drone attack on Burmese soldiers around one kilometre from the border province.

Hundreds of villagers have fled into Thailand to escape as junta drones retaliated with a barrage of bombs on rebel encampments.

The Royal Thai Air Force said it has dispatched fighter jets to patrol the border airspace.

Myanmar has fallen into civil war following the removal of democratically elected leader Aung San Suu Kyi, a Nobel Peace Prize winner, with a military coup in 2021.

Soldiers responded with barbaric force on protesting civilians leading to widespread condemnation and financial sanctions. Rebel groups and civilian militias around the country have since been locked in a series of ongoing clashes with the ruling military.

Aung San Suu Kyi has since been jailed for 33 years on politically motivated charges and is likely to die behind bars unless the army is toppled - a tragic end the politician hailed by Barack Obama as an 'inspirational icon of democracy'.