At least 43 people have been killed and scores more injured as two explosions ripped through the Moscow metro at the height of rush hour this morning.
The first blast at the Lubyanka station in central Moscow happened at 0756 (0356 GMT) as thousands of passengers were packed onto trains.
The headquarters of Russia's Federal Security Service (FSB), successor to the Soviet-era KGB, is located just above the station.
"The blast hit the second carriage of a metro train that stopped at Lubyanka," Russian emergencies ministry spokeswoman Irina Andrianova said.
"Fourteen people died in the wagon of the train and 11 on the platform," said Ms Andrianova. At least 10 people were wounded, she said.
The second explosion happened at Park Kultury at 0838 (0438 GMT), killing at least 18 more people. "There are killed and injured," a security source said.
Security sources told the state Interfax news agency the blast could have been caused by a suicide bomber
The Russian capital over the last decade was hit by a string of deadly explosions claimed by Chechen militants.
The last fatal attack on the Moscow underground was 2004, killing 39 people and wounded another 150. That attack was claimed by Chechen terrorists
more to come