In singapore and london. This is bbc world news. Its newsday. Good morning. Its 7am in singapore, midnight in london and 2am In Moscow where thousands of russians have been taking part in Anti Corruption rallies across the country in defiance of the kremlin. The biggest protests were in the russian capital, where police say 500 people have been detained. They included the Opposition Leader, Alexei Navalny, whod called for the demonstrations. The rallies are the biggest seen in russia for at least five years. From moscow heres our correspondent steve rosenberg. There were moments today when moscow resembled a battlefield. Russian riot police broke up an Anti Government protest, on what was a day of demonstrations across russia. In moscow, they detained more than 500 people. Earlier, police had poured into the city centre, warning that the protest was illegal. Still, thousands of people packed into pushkin square, to accuse the russian government of corruption. The level of corruption is