Speaking in his capacity of chairman of the sub-committee to regulate public transport at Suvarnabhumi, Mr. Chairat said intensified crackdowns on unauthorised taxis will start Friday July 31.

Notices have been issued and posted at the airport and a public relations campaign has been initiated to warn offenders, he said.

Meanwhile, police officers and security guards patrolling airport premises on Thursday began warning unlicensed tour guides before beginning to arresting those who are unlicensed from August 9. (TNA)