Adam Lanza fired 155 bullets in less than five minutes on the day he killed 20 children and six adults at Sandy Hook Elementary School, court documents have revealed.
NBC reports the total shots fired included 154 fired from a Bushmaster .223-model rifle and a final bullet, fired from a Glock 10mm handgun, that Lanza used to take his own life.
Three Samurai swords were also recovered from the Newtown, Connecticut home that Lanza shared with his mother, authorities said as they released search warrants from the second-worst school shooting in American history.
More top news
Younger workers are missing out on pay rises, with people born in the 1980s earning £40 a week less than those 10 years older, studies show.
Four in 10 European doctors are considering leaving the UK following Britain's vote to leave the EU, research suggests.
Eating 10 portions of fruit and veg every day could could significantly reduce the risk of heart disease and cancer, researchers say.