BBC News with Sue Montgomery.

The head of the railway company, whose run-away train devastated part of a town in the East Canada’s largest province Quebec, has blamed the accident on an employee, who he said had failed to properly set the brakes. At least 15 people were killed and 45 others are still missing in the town of Lac-Megantic where the crash sparked a massive blaze. From Lac-Megantic, David Willis.

Ed Burkhardt was heckled by angry residents and faced some pointed questions from local reporters after being whisked into town with a police escort. Having initially refuted suggestions that his company should be held to blame for a disaster, which wiped out virtually this entire town, he conceded that the train’s engineer had failed to fully secure the brakes. Mr Burkhardt said the engineer in question initially insisted he’d applied the hand brakes, but inquiries had revealed that that wasn’t the case. He said the man had now been suspended without pay.

Dzhokhar Tsarnaev, the man accused of carrying out the Boston marathon bombings with his brother, has pleaded not guilty to all charges, including using a weapon of mass destruction. Mr Tsarnaev spoke in a Boston court in his first public appearance since the attack which killed three people and injured 260 others in April. Jonny Dymond reports from Boston.

Dressed in an orange prison jumpsuit, Dzhokhar Tsarnaev was led into the court, handcuffed and shackled. Victims and relatives filled the courtroom and two overflow rooms, wanting to see the man who was alleged to have planted two bombs at the finish line of the Boston marathon in April. “Not guilty”, he said repeatedly as 30 charges were read out. Seventeen of the charges could lead to the death penalty. After the short hearing, Mr Tsarnaev blew a kiss to his family, was handcuffed again and was led out of the courtroom.