Illinois shootings

A police officer stands guard outside a Northern Illinois University building. The gunman entered a lecture hall at about 3pm local time armed with a shotgun and a pistol Photograph: Charles Rex Arbogast/AP

Law enforcement officers confer outside Cole Hall, where the gunman opened fire Photograph: Alex Garcia/AP

A campus car park becomes a staging area for emergency personnel Photograph: Eric Sumberg/AP

Dr John Peters, the Northern Illinois University president, addresses a press conference Photograph: Alex Garcia/AP

Paramedics rush a victim to an awaiting ambulance Photograph: Eric Sumberg/AP

An FBI agent takes photographs inside Cole Hall Photograph: Tannen Maury/EPA

Students stand outside the crime scene near Cole Hall Photograph: Scott Olson/Getty

Students gather for a prayer service for the victims Photograph: Scott Olson/Getty