Raising placards "Protect our food habits..Stop Pariwar attacks", three CPI(M) Members of Parliament from the southern state also staged sit-in at the entrance of Kerala House.
CPI(M) politburo member Pinarayi Vijayan, who later joined the protest also criticised the move to remove "buffalo" meat from the menu of Kerala House, saying it was an attack on the food habits of Malayalees.
"It is an attack on the Federal system prevailing in the country...It is an attack on the food habits of Malayalees," Vijayan told reporters.
A PCR call by a person, claiming to belong to a fringe right-wing group yesterday, complaining that beef was being served at Kerala House canteen had seen Delhi Police personnel rush to the premises.
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He also criticised Kerala Chief Minister Ooman Chandy for not registering his protest with the Centre adequately.
"The restaurant in Kerala House was procuring the meat only from outside," he said adding that there was no slaughter.
Majority of the people in Kerala consume beef, he said.