The Noida police on Tuesday said they were working to nab a man, who was accused of trying to extort Rs 20 crore from Paytm founder with three others by threatening him to leak the confidential data, even as the company assured its customers that their details were protected with high-level security.

On Monday, the police arrested Sonia Dhawan, person secretary to Paytm Founder and CEO Vijay Shekhar Sharma; her husband Rupak Jain; and Devendra Kumar, an employee at the company's administration department.