Kolkata, Jan 28 (IANS): The Enforcement Directorate (ED), probing the multi-crore teachers' recruitment scam, has recovered WhatsApp chats hinting at possible advance leaking of question papers to select candidates who took the written examination for primary teachers' posts in West Bengal in 2016.

Sources said that the selective leaking of question papers were mainly done by the youth Trinamool Congress leader, Kuntal Ghosh, who was arrested by the ED from his residence on January 21.

The probe agency has also recovered Whatsapp chats indicating that Ghosh enjoyed the patronage of former state education minister and Trinamool Congress secretary general Partha Chatterjee.

From the documents seized from Ghosh's residence, the central agency officials have also recovered copies of the admit cards of certain candidates who appeared for the recruitment examination for primary teachers in 2016.

The ED sleuths have come across the names of 35 individuals who secured jobs as teachers in state- run schools by paying money to the arrested youth leader and all of them are currently employed with different schools. Each and every one of them will be questioned to take the investigation forward.

"The recruitment scam seems to be in multiple layers, which again have sub-layers involving multiple players and multiple angles. The uncovering of one layer is leading to other layers. That's why the investigation process is getting prolonged," said a legal associate of ED.

The fact that question papers were leaked to select candidates was established after the ED sleuths noticed that some extremely below-average candidates, as per their academic records, scored exorbitantly in the recruitment examination.

Sources said that the marks secured in their academic examinations did not justify their scores in their optical mark recognition (OMR) sheets.