Huge security operation ahead of Winter Olympics

Last updated at 07:42
Sochi site in Russia

Russia has launched a huge security operation ahead of the start of the Winter Olympics in the resort of Sochi.

Thousands of police and army officers have been drafted in to help keep the winter games safe next month.

The security operation comes after two recent bomb attacks in Russian city of Volgograd.

So far, no one has claimed responsibility for the attacks but security has been stepped up as a precaution.