Over 200 people, belonging to various pro-Sri Lankan Tamil organisations, were arrested on Saturday, when they planned to stage an agitation here alleging that the air foirce station at Melavasthachavadi near Thanjavur was trying to airlift arms and ammunitions to Sri Lanka.

The agitators consiting members of Tamil Desiya Pothuvudamai Katchi and Periyar Dravida Kazhagam, wanted the Centre to initiate steps to safeguard Sri Lankan Tamils.