Students at the University of Jaffna marked the birthday of LTTE leader Veluppillai Prabhakaran in secret at midnight.
Last year, posters featuring the leader's quotes and photos were displayed around the campus.
This year however an increased security force is still in place since the Easter Sunday bombings, following which Tamil students were arrested on unrelated charges.
Students still decided to go ahead with the secret birthday celebration, but were also mindful of arrests made last year of Tamils who had openly done the same.
