YouTube activist Dhruv Rathee, who was detained by Delhi Police ahead of the Cockroach Janta Party's (CJP) protest at Jantar Mantar on Saturday, was released late at night yesterday, a police officer said. Rathee was detained from his house in Gurugram's Sector 56 yesterday as the police stepped up security across the national capital to prevent protesters from reaching Jantar Mantar for a protest seeking the resignation of Chief Election Commissioner Gyanesh Kumar over alleged irregularities related to the voter roll clean up exercise special intensive revision (SIR).