Two persons were held and later handed over to Central Bureau of Investigation after the Enforcement Directorate (ED) raided about 15 bank branches in the city over suspicions that bank officials were involved in money laundering after demonetisation, an ED official said on Thursday."Sanjay Jain, a sales tax consultant, and a bank official from a private bank were held and interrogated overnight by our team. It was suspected that two were involved in money laundering. They were handed over to CBI early in the morning," said an official from ED's eastern region office."We raided about 14-15 branches of public and private sector banks where crores of rupees were deposited after the announcement of demonetisation," he said.The agency carried out an enquiry of records of transactions' following allegations that black money was being converted into white after taking commission, he added.