Officers from the Counter Terrorism Command (SO15) have arrested a 64-year-old man on suspicion of money laundering.
The man was arrested at a residential address in north west London and is currently in police custody at a central London police station where enquiries continue.
Officers are also searching the address.
He was released later in the day on ‘police bail.’
The arrest is part of an ongoing investigation into money laundering.
Five other men who were arrested in 2013 and 2014 in connection with this investigation are on police bail to dates in April.