Columbine survivors mark twentieth anniversary of massacre

Samantha Haviland was a student at Columbine High School when the 1999 shooting happened

Survivors of the Columbine High School shooting have been speaking at a remembrance ceremony in Denver to mark the twentieth anniversary of the massacre.

Twelve students and a teacher were murdered by two teenagers.

A former student, Patrick Ireland, who was injured by bullets, said no one from the school or surrounding community had emerged unscathed.

The event was the culmination of three days of commemorations. Earlier, members of the public left flowers and cards at a memorial to the victims.

Bill Clinton spoke at the remembrance ceremony via video link

Columbine students and staff also marked the day by taking part in community service projects.

News imageGetty Images Survivor Will Beck places flowers at the Columbine Memorial at Clement Park in Littleton, ColoradoGetty Images
Survivor Will Beck placed flowers at the Columbine Memorial at Clement Park in Littleton, Colorado
News imageGetty Images Sean Graves, a massacre survivor and 2002 graduate, speaks during the Columbine Remembrance Ceremony at Clement ParkGetty Images
Sean Graves, a massacre survivor and 2002 graduate, spoke during the ceremony
News imageGetty Images Crosses with the names and portraits of the victims at Chapel Hill Memorial Gardens, also in Littleton, ColoradoGetty Images
Crosses with the names and portraits of the victims at Chapel Hill Memorial Gardens, also in Littleton, Colorado
News imageGetty Images People gather to remember loved ones at the Columbine MemorialGetty Images
People gathered to remember loved ones at the Columbine Memorial
News imageGetty Images Spencer Greenlee, a student at Columbine High School, sits in prayer at the memorialGetty Images
Spencer Greenlee, a student at Columbine High School, sat in prayer at the memorial
News imageGetty Images Candles wrap around a collection of flowers laid at the memorialGetty Images
Candles around a collection of flowers laid at the memorial
News imageGetty Images Visitors read a poem left the memorialGetty Images
Visitors read a poem left at the memorial