Three women and a man took part in the suicide bomb attack that killed at least 40 people and wounded scores on a Russian commuter train packed with school children and students near war torn Chechnya today.

The Russian prosecutor-general’s office today brought tax evasion charges against Platon Lebedev, one of the country’s richest men.

Prosecutors began searching the archives at Russia’s biggest oil producer today in what appeared to be the latest legal manoeuvre against the oil giant.