An explosion in a metro station in St Petersburg had killed at least 14 people and injured several others on April 4
Syria's armed forces has insisted it 'did not and will not' use chemical weapons, even against jihadist groups
In the several years Jalilov spent in Russia, he blended into the millions of migrants from central Asia, and led a secular lifestyle
The man suspected of the attack is reportedly in his 20s and belongs to central Asia
Death toll in the violence rose to 12 even as Ukraine's President, on a visit to Germany, pressed for more sanctions against Moscow
Rebel groups refuse to sit face-to-face with government representatives, both sides instead speak through intermediaries
Delegates from both sides have arrived in Kazakhstan with apparently divergent ideas on the talks' aims
Authorities have launched a massive search and rescue operation, say the total number of dead 'could be bigger'