Security has been tightened across Russia...
"It is difficult to prevent such terrorist attacks and to provide security on transport," President Dmitry Medvedev said. "It is necessary to tighten up what we do and to look at the problem on a national scale.
"Obviously, what we have done before is not enough," he said.
Interior Ministry head Rashid Nurgaliyev told Medvedev that security was being boosted across the country, "in particular in those cities with metro systems."
The first attack took place at 7:52 a.m. (03:52 GMT) at the Lubyanka station, located a short distance from Red Square and the headquarters of the Federal Security Service (FSB), and killed at least 24 people
The second blast detonated some 40 minutes later at the nearby Park Kultury station, also within walking distance of the Kremlin. At least 12 people lost their lives.
One more person is reported as having died in the bombings. The total number of injured in both blasts is over 60.