The British teenager killed in Syria is the nephew of a former Guantanamo Bay detainee.
Abdullah Deghayes, 18, from Brighton, East Sussex, is the nephew of Omar, who was held in the United States as an enemy combatant at the detention centre between 2002 and 2007 after he was arrested in Pakistan.
More top news
Officials also looking at whether doctor was with the pop star on a plane that made an emergency landing less than a week before he died.
British cyclist Simon Yates has failed drug test but his team are blaming an "administrative error" over an asthma inhaler.
Two ambulances crashed leaving one driver dead and three people seriously injured.