The Kerala police have detained four suspected supporters of Islamic State or Isis in Thiruvananthapuram and Kozhikode in Kerala.

Two of them were reportedly detained when they returned from Dubai to Thiruvananthapuram. Kerala special branch police and intelligence bureau are reportedly interrogating the duo for alleged connections with the Isis.

The incident comes just days after the the United Arab Emirates (UAE) deported two Indians to Kochi in Kerala on suspicion that they were radicalised by the Islamic State and were sympathisers of the jihadist group.

However, the Intelligence Bureau had allowed them to return to their home after questioning them.

"The two who were sent back to India have been interrogated by the Intelligence Bureau, and it was decided not to register any case against them. After putting them through some counselling sessions, they were allowed to return to their homes," according to an intelligence official.