Six of those arrested were bookmakers, said Deputy Metropolitan Police Chief Saroj Promcharoen, head of the gambling suppression operation, at a press briefing on Sunday.
The police also seized Bt26,000 in cash and betting slips showing wagers valued at approximately Bt2.55 million.
As most of the football gamblers were young people, the police coordinated with all educational institutions to instruct students about the negative impact of gambling, Pol Maj Gen Saroj said.
Regarding online betting, authorities were speeding up compiling evidence for further anti-gambling sweep.
Meanwhile, Bangkok police at all stations were ordered to closely monitor entertainment venues broadcasting football matches as some might be engaged in gambling activities.
Co-hosted by Ukraine and Poland, the UEFA European Football Championship ‘UEFA EURO 2012’ kicked off on June 8 and will continue until the championship final match on July 1.