Senior Congress leader and convener of the Opposition United Democratic Front P P Thankachan has accused Kerala's ruling Communist Party of India-led Left Democratic Front of trying to shield Thadiyantavida Naseer, the Lashkar-e-Tayiba operative from the state, who was arrested along the India-Bangladesh border recently. Thankachan, former speaker of Kerala assembly, has alleged that the state government is trying to protect the interests of some senior political figures.