Bhiwandi: A Bhiwandi court on Monday remanded four accused in the TET paper leak case to judicial custody after the expiry of their police remand, as the Special Investigation Team (SIT) of the Thane police continues to probe the interstate examination racket.The four accused include Suman Gupta, wife of the alleged mastermind Bijendra Gupta, who remains absconding, along with three other accused – Rajiv Shah, Akash Singh and Dhiraj Singh, arrested for the first time in the case.Suman Gupta was arrested by the SIT from her residence in Samastipur, Bihar, and brought to Bhiwandi on transit remand. Investigators suspect that she played a role in assisting her husband, who is believed to have orchestrated the paper leak network.The case came to light after Thane police arrested three accused first, Rajiv Shah, Akash Singh and Dhiraj Singh, from Bhiwandi just a day before the TET examination while trying to find customers to buy leaked papers they were carrying. During questioning, the accused allegedly revealed the name of Bijendra Gupta, mastermind of the case, from whom they got leaked papers. The disclosures led investigators to a wider interstate racket involving four states and, so far, a total of 10 accused were arrested and the remaining six accused are still under police custody.Officials said the probe is currently focused on tracing absconding mastermind Bijendra Gupta and identifying others who may have been part of the organised network responsible for leaking the Teachers Eligibility Test (TET) paper.