One man was killed and two were injured at a stabbing in Boston’s Dudley Square this afternoon, near where Sandra Bullock is currently filming a movie. The stabbings occurred around 1:50 p.m. when an argument spilled into the parking lot of the Social Security Administration office in Roxbury. A suspect is in custody. The victims were all between the ages of 17 and 21, and the two who were hurt only sustained non-life-threatening injuries. Bullock is filming The Heat, a new cop movie, roughly a block away from where the incident took place. Police said that a “quick-thinking detail officer” from the movie set helped nab the suspect.