In Russia, at least 40 people have been killed and 22 others injured in two explosions on the Metro system in central Moscow. Russian prosecutors say early reports indicate that both of the attacks were carried out by suicide bombers. <br/><br/>Rescuers of the Moscow emergencies department and firefighters are now working at the site. Security forces said the first blast happened at the city's central Lubyanka station killing 25. <br/><br/>A second explosion less than an hour afterwards happened at the Park Kultury station killing 15. Russian news agency Tass reported that no one has claimed responsibility for the attacks so far. The attacks appear to have been coordinated and timed to cause the greatest number of casualties. <br/><br/>Moscow's metro is the bussiest in the world and at 8 O'clock in the morning its jammed with hundreds of thousands of commuters.