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A police officer frisks a visitor's at the Red square in central Moscow on December 31, 2013 as security measures were increased in Russian capital after twin blasts killed 18 people in Volgograd. Russia beefed up security and mourned its dead on December 31 as the toll from jarring successive-day suicide strikes in the run-up to the Sochi Winter Olympic Games rose to 34. AFP PHOTO / VASILY MAXIMOVVASILY MAXIMOV/AFP/Getty Images
A police officer frisks a visitor's at the Red square in central Moscow on December 31, 2013 as security measures were increased in Russian capital after twin blasts killed 18 people in Volgograd. Russia beefed up security and mourned its dead on December 31 as the toll from jarring successive-day suicide strikes in the run-up to the Sochi Winter Olympic Games rose to 34. AFP PHOTO / VASILY MAXIMOVVASILY MAXIMOV/AFP/Getty Images

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Police detains dozens in anti-terror op

After suicide bombings left 30 dead, Russian police have detained dozens in an anti-terror operation. Diana Magnay reports.

Police detains dozens in anti-terror op

After suicide bombings left 30 dead, Russian police have detained dozens in an anti-terror operation. Diana Magnay reports.