A native of Pattukottai in neighbouring Thanjavur district has been arrested by the National Investigation Agency (NIA) on charges of helping a man having links with ISIS obtain a passport, police said here Thursday.

M Shafeek Ahmed was arrested here on Tuesday and later produced before a NIA court in New Delhi, which remanded him to seven-day custody, they said.

Ahmed had allegedly helped V K Shajahan alias Mohamed Ismail Mohideen with ISIS links, get a passport with forged documents.

Shajahan had been deported by Turkish officials for his alleged involvement in ISIS activities in 2017 and arrested at the Delhi airport.

Later, the case was handed over to the NIA, which carried out probe and arrested Ahmed for his involvement in it, sources said.