The Maharashtra Anti-Terrorism Squad on Wednesday nabbed a 27-year-old man in connection with the incident of arson aboard an express train in Kerala in which three people were killed, an official said and claimed the suspect has "confessed" his involvement in the crime.

It was a joint operation of central intelligence and anti-terrorism squad personnel who caught the suspect, identified as Shahrukh Saifi, from Ratnagiri railway station in Maharashtra, he said.