Tamil Nadu special task force (STF) and police are keeping strict vigil on the state border along Kerala, to prevent infiltration of seven suspected Maoists.
Based on information about movement of strangers along the border at Attapady in Kerala on Friday, police from both the states are carrying out combing operations to flush them out, police said.
The tribals in the area claimed that they noticed seven persons, including two women, entering Attapady, a few kilometres from Tamil Nadu.
As there was the possibility of them entering Coimbatore, either via Mankarai or Mettupalayam, STF and police are keeping strict vigil in the area, they said.