On 24 October, police raided the Bolshevik newspaper offices, smashing machinery and presses; Stalin salvaged some of this equipment to continue his activities. In the early hours of 25 October, Stalin joined Lenin in a Central Committee meeting in the Smolny Institute, from where the Bolshevik "coup" — the October Revolution — was directed. Bolshevik militia seized Petrograd's electric power station, main post office, state bank, telephone exchange, and several bridges. A Bolshevik-controlled ship, the "Aurora", opened fire on the Winter Palace; the Provisional Government's assembled delegates surrendered and were arrested by the Bolsheviks. Although he had been tasked with briefing the Bolshevik delegates of the Second Congress of Soviets about the developing situation, Stalin's role in the coup had not been publicly visible. Trotsky and other later Bolshevik opponents of Stalin used this as evidence that his role in the coup had been insignificant, although later historians reject this. According to the historian Oleg Khlevniuk, Stalin "filled an important role the October Revolution... as a senior Bolshevik, member of the party's Central Committee, and editor of its main newspaper"; the historian Stephen Kotkin similarly noted that Stalin had been "in the thick of events" in the build-up to the coup.