Protesting the Centre's alleged inaction against 1984 riots accused, more than 200 activists of various Sikh outfits on Friday blocked rail tracks on the Ludhiana-Delhi section.

A group of protestors led by Surjit Singh, President of a Sikh group, Danga Peerat Association, squatted on the rail tracks here and raised slogans against the government. As a result, the New Delhi-bound Shatabdi Express scheduled to leave the city at 7 am was detained by the railway authorities at the station here itself. The super fast train was later sent to the national capital via Dhuri, railway sources said.