MOSCOW (dpa): Police were out in force on the streets of Moscow on Saturday ahead of an expected mass demonstration in protest at alleged vote-rigging in Vladimir Putin's presidential election victory. Officials erected crush barriers and installed metal detectors in the area near the Kremlin where the demonstration was to take place, Interfax news agency reported. Lines of police buses and riot control vehicles were parked in neighbouring streets. As many as 50,000 protestors were expected to participate in the demonstration, which has received official permission. Putin, who currently holds the post of prime minister, emerged victorious in the elections on Sunday, securing almost 64 per cent of the vote in the first round, thus making a run-off round unnecessary. Putin was elected president in 2000 and 2004, relinquishing the post after two terms as required by the constitution. BM ShortURL: http://goo.gl/dQb6l Tags: Anti Putin, Police, Prostests, Russian Section: Latest News