Widespread power outages have hit Moscow (search).

Russia's energy minister blames it on a fire and explosion at a substation.

The Ministry of Emergency Situations says outages are reported throughout southern Moscow and as far as 120 miles away.

Subway lines and trolley-buses have been forced to shut down. Some apartment buildings have lost their water supply and trading's been suspended on a Moscow stock exchange.

Russia's Interfax news agency reports passengers have been evacuated from stalled subway trains. And passengers waiting for trains have been told to leave.

The weather's been unseasonably warm in Moscow this week, putting extra demand on the power system.