BBC Verify has been analysing social media videos and images from Moscow to try to build up a clearer picture of the blast that killed Russian Lt Gen Igor Kirillov and his assistant. Ukrainian sources say they carried out the attack on the senior commander, who has overseen Russia's Radiation, Chemical and Biological Protection troops since He was sanctioned by the UK in October and accused of being a "significant mouthpiece for Kremlin disinformation". Lt Gen Kirillov was leaving a modern apartment building in south-east Moscow early on Tuesday when the device hidden in a parked scooter was detonated, Russia's Investigations Committee - the country's equivalent of the FBI - said.
Footage authenticated by BBC Verify shows two people leaving the building before an explosion next to the entrance.
Their clothes are the same colour as those on the bodies pictured in the aftermath. A scooter appears to be propped up near the door. Nothing after the blast is visible, the rest of the footage is obscured by debris from the explosion.
In other footage analysed by BBC Verify, the remains of an electric scooter can be seen lying among debris between two bodies and a demolished doorway. A close-up image of the scooter, verified by matching it to the debris, shows it is largely intact - apart from its missing handlebars.
Experts at Janes - a private open-source investigations organisation - told BBC Verify that the images suggested that the explosion was caused by an Improvised Explosive Device IED , rather than a conventional munition.
