An armed robbery in East Boca Raton has prompted a police investigation as three men are sought for allegedly stealing $250,000 from two victims at gunpoint. Boca Raton Police were called to the 600 block of NE 29th Place shortly after midnight yesterday, where the victims reported the robbery upon returning from a nearby casino. The assailants, described as black males in their 20s wearing dark clothing and masks, made off with cash, watches, phones, and a purse, according to information provided by CBS12…