bangkok thai police arrest four members hells angels biker gang accuse drug crimes violence pose threat society tourist police say thursday three australians canadian arrest wednesday pattaya major tourist resort reputation hub foreign gang drug deal sex industry piyapong ensarn pattaya tourist police tell reuters two accuse gang members would deport two others would charge drug offences trace cocaine find say reuters unable contact either accuse lawyers comment pattaya 100 km 60 miles southeast thai capital bangkok police say still look three australians believe members gang british member gang flee country could arrest piyapong say gang make headline 2015 one members murder australian man sentence death february kill thai police arrest hells angels gang members