Officials with Russia's domestic intelligence service, the FSB,have yet to comment on whether the derailment was caused by terrorism.

VOA: standard.2009.11.27

But he would not comment on reports in local media that an FBI team is in the country in connection with the investigation.

VOA: standard.2009.12.11

That comment did not go down well with the leader of the opposition Conservatives, David Cameron.

VOA: standard.2009.06.15