Paras (19), who was injured in the clash, died at a hospital here, after which a mob damaged two cars parked near the Fountain Chowk and pelted stones at a few shops.
The mob also tried to torch two state transport buses, but the police by then had rushed in reinforcements.
The police had to resort to a mild lathicharge to bring the situation under control and a few persons were also rounded up.
He was shifted to the Government Rajindra Hospital, where he succumbed to his injuries today.
The family members and friends of the deceased, who staged a protest outside the hospital, were soon joined by some other people.
The protesters then went on a rampage demanding action against those responsible for the teenager's death.