Sayed Waqas (24), was picked up along with four students at Vasantnagar area here after the local cyber police found they have been circulating an anti-Modi MMS.
The four were released after being questioned, but Waqas was arrested under the IT Act, police said, but did not confirm when he was held.
Waqas, pursuing his MBA in a college at Bhatkal in Uttara Kannada district, was in the city for an internship. He was staying with the other students in a rented accommodation at Vasantnagar after police at Belgaum traced the mobile number to his residence.
The incident comes a few days after a man from Goa was booked for posting a derogatory message against Modi on Facebook.