CHICAGO — A man was fatally shot at the Howard Street CTA station Tuesday, police said. Dispatchers began to get calls about the shooting shortly before 12:30 p.m., and trains were soon halted as officers investigated.

Police said an unidentified gunman pulled out a handgun and began shooting, striking 20-year-old Macksantin Webb in the chest and neck as he stood on the Red Line platform. The Rogers Park resident was taken to St. Francis Hospital where he was pronounced dead shortly after 1 p.m., according to the Cook County medical examiner's office.

The suspected gunman was last seen running north from the station on Paulina Avenue, according to Chicago police. No description of the shooter was immediately available, but police later said detectives were questioning multiple people of interest.