Dec 04, Jaffna: Sri Lanka's major Tamil constituent Tamil National Alliance (TNA), Tamil National People's Front (TNF) and several other civil society organizations based in Jaffna held a mass protest this morning opposite the main bus terminal against the arrest of four university students.

The protest was held to condemn the crackdown on the Tamil students of Jaffna University last Wednesday and to call for the release of four undergraduates held by Police, an organizer of the protest said.

Sources from Jaffna say that security has been tightened in the Tamil dominated city especially near the tension stricken Jaffna University.

The teachers and students of the Jaffna University are on strike since last Wednesday demanding the government to halt repression and release the arrested students.

Meanwhile, Police spokesman SSP Prishantha Jayakody said that the four students arrested under suspicion for subversive acts were produced in the Vavuniya Magistrate Court today and one of the suspects was released on bail.

The other three students will remain in the remand while the Terrorist Investigation Division has been given permission to question them, the spokesman said.

The four students were arrested on suspicion of fire-bombing an office of a Tamil political party and organizing events to commemorate the banned terrorist group's Martyrs' Day last week which is illegal under country's Terrorism Prevention laws.