Thai immigration police bureau will issue a warning to Kuwait Airways for allowing Saudi teen Rahaf Mohammed Al-Qunun to board its flight to Bangkok although she had insufficient travel documents.

Pol Lt General Surachate Hakparn said on Wednesday that he planned to have immigration laws that have been used for more than 40 years reviewed.

The laws should increase the penalty for airlines whose staff did not check required documents including a return ticket for a passenger.

The bureau chief is referring to the case of Al-Qunun, 18, who flew with Kuwait Airways to Bangkok on January 5.

She was detained at Suvarnabhumi Airport reportedly because her father alerted the Saudi embassy in Bangkok that she fled her family during a trip in Kuwait.

During her detention, she tweeted that she wanted to travel to Australia to seek asylum as she was abused by her family and was being forced to marry.

However, Thai immigration police at the airport revealed that she had no air ticket to Australia.

In case she wished to apply for a visa on arrival to enter Thailand, al-Qunun should prove she had an onward flight, the general said.