A 17-year-old girl was one of two people who were critically injured in vicious stabbings Tuesday, police said. In the incident involving the teen, officers responded at 7 p.m. to a fight that broke out on Valencia Street between 20th and 21st streets. When the officers arrived, they learned that the 17-year-old had been stabbed and taken by friends to San Francisco General Hospital, police Officer Gordon Shyy said Wednesday. Read More