Some 30 commuter and long-distance trains were delayed, while many passengers on St. Petersburg’s subway – the world’s deepest – had to walk along the tunnels and up the escalators to get out.

Traffic lights were off on Nevsky Prospekt, the city’s central avenue, causing traffic jams. Almost half of the city, which has a population of 4.5 million, was left without water supplies.

via Power blackout paralyzes St. Petersburg for over an hour (Update 1) | Russia | RIA Novosti.