At least 38 commuters were killed at rush hour this morning in Moscow, after two female suicide bombers attacked the city's busy Metro system. More than 100 people were wounded in the attack.
Russian leaders have vowed hunt down those responsible for the attacks. President Dmitri Medvedev labelled the bombers "beasts" and vowed to "destroy" them.
The White House is calling today's twin suicide bombings in Moscow an "outrageous terrorist act." President Obama called his Russian counterpart to express his condolences and to say the U.S. is ready to help bring those responsible to justice.
The Associated Press reports that the first blast occurred just before 8 AM local time at the Lubyanka station underneath the offices of Russia's Federal Security Service. The second blast occurred 45 minutes later at the Park Kultury station.
Rebels from Caucasus, the region that includes Chechnya, are thought to be responsible for the blasts. Separatists have fought Russian forces there since the mid-'90s. It's Moscow's deadliest attack since 2004.
Back in New York, the Metropolitan Transportation Authority (MTA) says the agency has a "heightened security presence" due to the Moscow bombings. An MTA spokesperson said the beefed up security on New York City mass transit systems is being done as a precaution.
In the capitol, President Barack Obama has condemned the Moscow Metro attack, and has offered his condolences to the city's people. He said in a statement that the American people stand united with the people of Russia in opposition to violent extremism.
UPDATE SINCE THIS STORY WAS FIRST POSTED: This story has been updated to include an updated death count and the president's statement from the White House.