Inspector Sudheer Kallen of Ulikal Police Station in Kannur Rural, where the FIR has been registered, said that it was not immediately clear who was behind the alleged attack.
The agency sleuths carried out these searches since this morning and the raids are still underway at Delhi's Shahin Bagh and other locations of suspects.
The NIA carried out searches at the hideouts of suspects in the case which was taken over by the anti-terror agency almost a month ago and it started its probe charging the "highly radicalised" arrested accused Shahrukh Safi.
Kerala Pradesh Congress Committee (KPCC) president K Sudhakaran on Sunday wrote to External Affairs Minister S Jaishankar and sought his intervention to repatriate the mortal remains of an Indian national in Sudan who had died after being hit by a stray bullet.
A case was registered at the Taliparamba police station in Kerala's Kannur district for allegedly hatching a conspiracy and for levelling false and defamatory allegations via Facebook against Kerala Chief Minister Pinarayi Vijayan, his family and also against MV Govindan state secretary of C
The statement issued by the Chief Minister's Office said, "I want to appreciate the investigation team for nabbing the suspect in the Alappuzha-Kannur Executive Express incident in which three people were killed and around 10 injured after setting fire to the passengers."
"The suspected accused has been taken into custody. He will be brought back to Kerala. After a detailed interrogation of the accused, we will be able to know more details", Kerala DGP on Kozhikode train fire case
"The person who committed this heinous crime has been apprehended in Ratnagiri of Maharashtra. I thank the Maharashtra government, their police and RPF and the NIA who have apprehended him this quickly," Vaishnaw told ANI outside Parliament here today.
The accused, identified as Shahrukh Saifi was nabbed from Maharashtra's Ratnagiri district on Tuesday night based on a sketch released by the Kerala Police.