Ukrainian security services have thwarted a plot to kill Russian PM Vladimir Putin, Russian officials say. Two suspects were detained in the Ukrainian port of Odessa, Russia's state-owned Channel One TV reports. The arrested men were both shown on TV admitting their involvement in the plot, after an explosion at a flat in January in which one suspect died. Ukrainian security officials have refused to confirm the arrests were part of a plot to assassinate Mr Putin. But the Russian prime minister's press secretary, Dmitry Peskov, told the...