Russian train bombing - 4 suspects now sought.

Suspects sought in Russian train bombing.

And can you believe one of them is a former Caucacus soldier who "defected to a group of Islamic terrorists"? (Paging Major Nidal Malik Hasan.) Hard to feature, I know. /s

Russian police investigators said Monday they had located the hideout of four persons suspected in the train bombing- derailment at the weekend which killed 26 persons and injured 100.

A police spokesman was cited by the Interfax agency as saying a hideout had been found in a village not far from the scene and that in an attic the traces of four suspects had been discovered. The hunt for the four was now underway with the help of phantom pictures, the spokesman said, in developments three days after the late-night derailment of the Nevsky Express train on the busy St. Petersburg-Moscow line.

Moscow media, citing investigators, reported that the chief suspect being sought was a former soldier from the northern Caucasus region who had defected to a group of Islamic terrorists.

More on those Islamic terrorists:

The business daily Kommersant cited an unidentified police source as saying authorities suspect the latest bombing involved the same criminal group linked to an almost identical attack on the same track in 2007. The 2007 attack injured dozens in the train that passed over an explosive device; the motive went unexplained.

Two suspects in the 2007 blast were detained but a third, Pavel Kosolapov, a former military officer believed to have links to Chechen separatists, remains a fugitive.

<--- Recently released composite sketch.

Additional details - a woman is among the four suspects.

"According to preliminary information, four people lived in this house for some days before the attack. The DNA of four people has been found, one of which is the DNA of a woman. We have reason to think that these people are linked to the attack," the source said.