Mumbai/Patna: The Enforcement Directorate (ED) on Thursday arrested Hasan Ali's associate Kashinath Tapuria and later produced him to Mumbai sessions court which remanded his custody to the ED till March 30.

Meanwhile, the Bihar police raided the Bihar Regional Passport Office and seized some documents relating to issuance of fake passport to the stud-farm owner.

The ED, which is probing the case involving the Pune-based businessman, raided the residence of AICC member and Congress spokesman Amlendu Pandey in connection with the investigations on Wednesday, according to an ED official.

ED sources said that Tapuria, who is based in Kolkata, was arrested in Mumbai after three days of questioning. He has earlier denied having any links with Hasan Ali Khan.

Khan's Chartered Accountant Sunil Shinde has also been asked to appear before the ED for questioning. The ED had conducted searches at his residence in Pune on Wednesday. The I-T Department has raised a tax demand of Rs 591 crore against Tapuria and Rs 20,540 crore against his wife.

Meanwhile in Patna, City Superintendent of Police Shivdip Lande said, "Police raided the office of the Regional Passport Officer here and seized some documents relating to the passport issued to Ali."

Lande said the police would continue to probe how Khan got a passport from Patna on a fake address. In his passport application, Khan gave Pathantoli locality in Alamganj area in Patna as his address and Belsand village in Sitamarhi district as the permanent address, official sources said.