The conditions of four wounded survivors from last Thursday's tragedy in Nong Bua Lam Phu are improving, according to doctors.

Two boys and two adults are being treated in intensive care units at Nong Bua Lam Phu Hospital in the northeastern province.

The mobility of a boy named Thanatpong Somparn, or Nong Suma-ie, is starting to improve and he can now act on the instructions of doctors.

Kanpong Sueana, or Nong Kan, is also moving after undergoing an operation to treat a cerebral haemorrhage, and the result of the operation was satisfactory, according to doctors.

As for the two adults, Charoen Chaikruean's condition was also improving as she is beginning to move more easily and is no longer dependent on a ventilator.

The second adult, Benjawan Panlert, has regained consciousness, is also now moving and can now breathe without a ventilator.

Deputy Prime Minister Anutin Charnvirakul said young patients are likely to make a quick recovery, though they must be looked after closely.

"All patients have received assistance from Their Majesties the King and Queen, who have sponsored their medical treatment,'' Anutin said.

Prime Minister Prayut Chan-o-cha on Sunday led cabinet ministers to visit the families of the victims and attend the funeral rites in Nong Bua Lam Phu.