The Enforcement Directorate or ED has arrested Humayun Merchant, stated to be an aide of late gangster Iqbal Mirchi, in connection with a money laundering case, officials said today. They said Humayun Merchant was arrested in Mumbai under the provision of Prevention of Money Laundering Act or PMLA on Monday night. He will be produced before a special court for further custody, they said. Humayun Merchant is stated to be an aide of late gangster Iqbal Mirchi, who was a close associate of global terrorist Dawood Ibrahim.