Large parts of the capital suffered power cuts on Thursday as striking contractual employees of the two BSES discoms resorted to sabotage by shutting off supply at substations. The cuts started from Wednesday evening, when contractual workers under the Delhi vidyut board employees union started shutting off power supply in Masjid Mod, CR Park, New Friends Colony, Greater Kailash I and II, Sarita Vihar, South Extension, Kalkaji, Nehru Place and surrounding areas.