Moscow police on March 2 arrested hundreds protesting against military intervention in Ukraine, a rights group said, after President Vladimir Putin won approval from senators to send troops into the neighboring country. Ovdinfo, a rights group that tracks arrests at demonstrations, said 352 were detained at two anti-war protests in central Moscow. Police gave a much lower figure of 50 people detained for "attempts to violate public order," according to Interfax news agency. Anti-war protesters gathered near the defence ministry in central Moscow, and at Manezhnaya square near the Kremlin. Demonstrators held up peace signs and posters saying "No to war," while some also held Ukrainian flags and ribbons in the national colors of yellow and light blue.