Police are investigating shootings that injured three people in Harrisburg. Shots were fired yesterday afternoon near 20th and Herr streets and a young man was found suffering from a gunshot wound. Police Chief Thomas Carter says he is in "grave" condition. A few moments later, another gunshot victim showed up at the hospital in a private car and underwent surgery. It is not clear if the shootings are related. A few hours later, another person was shot on South 15th Street and taken to the hospital. That victim's condition is not known.