A list consisting more than 70 London bank accounts related to Pakistani political party MQM is being investigated for money-laundering by UK police.
Twenty-six are in the name of MQM leader Altaf Hussain. UK-based party officials are waiting to hear if they will face money-laundering charges.
Six British detectives were recently in Pakistan seeking co-operation in the alleged money-laundering case.
The MQM has said Scotland Yard's claims about the bank accounts are baseless.
British police have been investigating the MQM, one of Pakistan's main political parties, for several years but the pace of their investigations has picked up markedly since a meeting in London in April between Pakistan's Interior Minister, Chaudhry Nisar Ali Khan, and Home Secretary Theresa May.
The Scotland Yard documents, which include details of both open and closed bank accounts, were submitted to Pakistan's Federal Investigations Agency (FIA) as part of a British request for assistance.