According to police, three persons approached a Preliminary health Centre at Munda and sought medicines. When told that there was no doctor, they just left and the health centre staff immediately informed forest and police officials.
Police personnel including specially trained commando force of Kerala police,'Thunderbolt', combed the area, they said.
Earlier, last month, the specially trained commando force had conducted search operations in the Aralam and Kannavam forest areas in Kannur district, in the wake of reports of suspected Maoist presence in the forest areas bordering Kerala and Karnataka.