Stratford police are warning residents about a series of attacks and cell phone robberies.Police report several attacks took place on Huntington Road, West Broad and Hamilton Avenue. They say the attacks have occurred at night while the victims were walking alone. Police say there are strong similarities between each assault by a group of young men where the only items stolen were the victims? cell phones.Police say some of the victims have been injured, including one concussion, during the muggings. They are advising Stratford residents to use caution when walking at night. Anyone with information is asked to contact the Stratford Police Department.