"We are setting up regular anonymous patrols to try to catch the perpetrators," Ms Bannykh told the Daily Telegraph. "There are rumours that a young man walking with a woman and a child in a push-chair was dropping something on the ground." A group of victims and concerned residents in the Ploshchad Vernadskogo suburb have also offered a 100,000 roubles (£2,000) reward for information leading to the capture of those responsible. Most have taken to walking their dogs in muzzles, or moved to other parks.