Pepper spray was fired and a senior police officer struck with an electric fan in the melee as gamblers tried to escape from about 100 metropolitan police during a raid on a heavily guarded illegal casino in Bang Sue district early this morning (Dec 21). Police arrested 199 gamblers and seized a large quantity of gambling equipment as well as cash in the 4.30am raid on the casino in the Tao Pun area of Techa Wanit Road.