COLOMBO, Sri Lanka — India’s investigative agency says it has arrested a 29-year-old Indian man who has identified himself as a follower of the alleged leader of the Easter bombings in Sri Lanka and was plotting a suicide attack in the southern Indian state of Kerala.

The National Investigation Agency said in a statement late Monday that Riyas A., also known as Riyas Aboobacker, was arrested. It said three others were brought in for questioning related to suspected links to the Islamic State group, which has claimed the April 21 Sri Lanka attacks that killed more than 250 people.

The statement did not provide any details about Aboobacker’s alleged plot in Kerala. But according to the statement, Aboobacker said during questioning that he’s been following the speeches and videos of Mohammed Zahran, the militant who Sri Lankan authorities said led the Easter attack, for more than a year.