Moscow

A suicide bomber killed at least 35 people at Russia's busiest airport on Monday, state TV said, in an attack on the capital that bore the hallmarks of militants fighting for an Islamist state in the North Caucasus region.

Yury Luzhkov, sensationally fired as Moscow's mayor in September, has sent his daughters to live and study in London as he fears for their safety should they remain in Russia, a report said on Sunday.

These eerie pictures show the city of Moscow shrouded in dense smog today as wildfires that have killed 50 people nationwide continue to burn. Flights at international airports have been grounded and visibility in the capital is down to a few dozen yards as the fires continue to tear through forests and villages.

At least 37 people were killed and 62 injured on Monday when two female suicide bombers detonated explosives on two crowded subway trains during the morning rush hour in Russia's capital, Moscow.

A top U.S. diplomat is in Moscow to seek cooperation on nuclear arms reduction and stabilizing Afghanistan as the Obama administration looks for ways to sidestep disputes and work with Russia.