A 58-year-old man has died after a collision with a tipper lorry on a cycle superhighway in east London.
The cyclist was involved in the collision on the roundabout at Bow Road, Bow, at 08:45 BST on Monday.
Transport for London (TfL) said he was the first person to be killed on the city's cycling superhighway network.
Police said the driver of the lorry had been arrested on suspicion of dangerous driving and had been bailed until 18 November.
A TfL spokesperson said it was "extremely sorry to learn of the tragic death".
He said TfL had delivered several initiatives, such as new roadside safety mirrors and awareness campaigns about the dangers of undertaking lorries, over the past year.
An "on-bike" training course for freight drivers in London, an online HGV cycle safety guide and "cycle safe" technology for all TfL highway contractor vehicles were also being introduced by the end of the year, he said.
There are four blue-painted priority lanes for cyclists in London with eight others due to open by 2015.