The Central Bureau of Investigation arrested three former directors of two Kolkata-based private companies in an ongoing investigation related to two chit fund scam cases on Thursday.A CBI spokesperson said the accused had hatched a criminal conspiracy alongside others and illegally collected approximately Rs 565 crore from poor investors after fraudulently promising them high returns without any permission from regulatory bodies.In pursuance of that, they allegedly committed cheating and criminal misappropriation of public funds, the spokesperson said.The case was registered on June 6, 2014, on the orders of the Supreme Court dated 9.5.2014 passed in a writ petition against the officials of the said company.During the ongoing investigation into another chit fund case, CBI officers arrested a former director of another Kolkata based private company for allegedly hatching a criminal conspiracy and illegally collecting approximately Rs 60 crore from poor investors by promising high returns, without any permission from the regulatory bodies.