Of them, nominations of 307 candidates were found valid after a scrutiny held yesterday, the sources said.
"Thirteen nominations were rejected of which five were dummy candidates of BJP and Indigenous People's Front of Tripura and one of Trinamool Congress. The rest were from independent candidates," Additional Chief Electoral Officer, Debasish Modak told PTI.
He said the nominations were rejected on technical grounds like some candidates not filing affidavits or in some cases paperwork not being submitted according to official procedures.
Besides, training for police officials, expenditure monitoring and IT applications are ongoing, he said.
The election result for the 60-member Assembly will be announced on March 3.