Thiruvananthapuram, April 29 -- In the wake of the National Investigation Agency's (NIA) crackdown on sleeper cells of terror outfit Islamic State in South India following the serial bombings in Sri Lanka, intelligence agencies are collecting details of 150 youth who have gone missing from Kerala over the last few years, a senior intelligence official said.

A Salafi centre in Kozhikkode is under the scanner and agencies are collecting details of some youth who went to Yemen for religious studies in last three years, he said.

"We have information that more than 50 people have gone to Yemen for religious studies in last couple of years. Though they can't be dubbed terrorists, possibilities of radicalization are there," said a senior state i...