Mumbai, Aug. 30 -- A 25-year-old woman was killed in Chembur on Friday evening when the two-wheeler she was riding pillion on with her younger brother was allegedly hit by a speeding cement mixer, police said. The siblings were on their way from Govandi to exchange clothes they had bought for Raksha Bandhan when the collision threw 20-year-old Manas Dongare towards the footpath and his sister, Dhanashree, under the mixer's left front tyre. Around 6pm on Friday, when the siblings had reached Subhash Nagar, Manas allegedly noticed a cement mixer approaching at speed. He gave way to allow the vehicle to pass, but the mixer allegedly struck the right side of his two-wheeler's handlebar, causing him to lose control, a Chembur police officer said. The collision threw Manas towards the front of the vehicle, while Dhanashree was thrown towards the mixer and came under its left front tyre, police said. People gathered at the scene and tried to free Dhanashree, who was trapped under the tyre. Police said people shouted at the driver to stop, but the mixer did not stop immediately. Dhanashree was eventually removed from under the vehicle and, along with Manas, taken to Zen Hospital in Chembur. Dhanashree was declared dead at the hospital. Police said she had suffered severe head injuries in the crash. Chembur police have seized the cement mixer and registered a case against the unidentified driver....