NEW DELHI: Delhi Chief Minister Arvind Kejriwal's aide, Bibhav Kumar, arrested for allegedly assaulting AAP MP Swati Maliwal, is being taken to Mumbai for the retrieval of data from his formatted iPhone, police said on Tuesday.

Kumar is under five-day judicial custody in connection with the alleged assault on Maliwal, a Rajya Sabha MP, at the CM's Delhi residence.

Police said Kumar had formatted his phone before transferring the data to some person or device in Mumbai.

His mobile phone was seized following his arrest but it was found to have been formatted, they said.