Muzaffarnagar: Six people were booked under National Security Act for allegedly supplying counterfeit currency, police said on Wednesday. Earlier arrested for cow slaughtering, the six people were later booked under NSA for pumping fake currency notes in the market, Senior Superintendent of Police Sushil Kumar said. The accused were identified as Tasmim, Riyasat, Nafees, Shahnawaz, Ikram and Nadeem, he said, adding they are currently lodged in the district jail.