Thailand will delay the deportation of the wife and children of the top commander of the Arakan Army insurgent group that is fighting Myanmar's army while authorities carry out a full investigation, Thai officials said on Sunday.

Hnin Zar Phyu, 38, the wife of Maj. Gen. Tun Myat Naing, 41, their 11-year-old daughter and 11-month-old son were arrested in northern Thailand last Wednesday and charged with illegal entry after Myanmar revoked their passports.

The arrests prompted a barrage of pressure on Thailand from rights groups concerned that the family could be forced back to Myanmar in what has been an increasing pattern by Southeast Asian states to send home each other's dissidents.