Original sentence: As of June 2007, investigations are ongoing to ascertain the cause of their deaths.Five students of the Thandikulam Agriculture Farm School were also killed in either the explosion or the subsequent gunfight that followed.It took place on November 19, 2006 when LTTE carders exploded an Improvised explosive device (an IED)  targeting a military truck killing four Sri Lanka Army soldiers.The Massacre at Thandikulam  is a disputed event which occured during Sri Lankan Civil War
Edited sentence: Five students of Thandikulam Agriculture Farm School died on 2006 November 19 after being shot by group of personnel in camouflage uniforms.Massacre at Thandikulam  is a disputed event during Sri Lankan Civil War.The Sri Lankan Army denies that the students were specifically targeted and has called in for an investigation by the government