CCTV appears to show bomber shopping hours before explosion

Police have warned the public not to approach the blue suitcase that Salman Abedi was seen pulling just hours before he blew himself up and killed 21 innocent people at the Manchester Arena.
Greater Manchester Police have issued a CCTV image of the suicide bomber with the hip-high case in the city centre last Monday.
The force are warning people to contact them immediately if they see the luggage item and not to approach it.
Detective Chief Superintendent Russ Jackson, from the North West Counter Terrorism Unit, said: 'We believe Abedi was in possession of this case in the days before the attack at Manchester Arena on Monday 22 May.
'I want to stress that this is a different item than the one he used in the attack.
'We have no reason to believe the case and its contents contain anything dangerous, but would ask people to be cautious.'
Mr Jackson added: 'The public should not approach the case if they see it but contact police immediately on 999.'
As well as the CCTV image of Abedi, detectives have released a picture of a replica case, as they continue to piece together the terrorist's movements in the lead-up to the attack.
It is known that the 22-year-old visited the Wilmslow Road area of Manchester and was also seen in Manchester city centre with the wheeled case.
GMP are urging anyone with details about the suitcase to get in touch and let them know.
Meanwhile, Abedi is believed to have been filmed shopping for hardware and snacks on the day of the attack.
CCTV video was released today after being recorded last Monday in a Spar store close to the flat in the city where Salman Abedi, 22, was hours before the attack at the Ariana Grande concert.
Abedi can allegedly be seen walking around the aisles looking at items and picking up a handful of goods before going to the checkout and walking out with a bag.
Police have been working round-the-clock since Abedi killed 15 adults and seven children in the worst terrorist atrocity since the July 7 bombings in 2005.
BBC News, which released the video this afternoon, said the footage has been passed to investigating officers. It is not yet clear what was bought at the shop.
A total of 16 arrests have been made in connection with the attack - the latest being a 23-year-old man in West Sussex – but two people have been released.
A terror network is believed to be behind suicide bomber Abedi, who lived in Manchester after his parents had moved to Britain from Libya.
Abedi's elder brother Ismail is among the suspects being held in Britain, and a younger brother and Abedi's father have been detained in Libya.
Intelligence services have launched an inquiry into how warnings about Abedi's radical views were handled amid claims that vital warning signs were missed.
Police are scouring 12,960 hours of CCTV recordings in their search for clues, have collected more than 630 pieces of evidence and have searched 21 addresses.
Today, pictures emerged of a digging at a landfill site in Bury, which is part of the investigation into the bomb attack.
Authorities say Abedi returned to Britain from Libya on May 18, and probably completed assembling his bomb at a rented apartment in central Manchester.
Britain's official terror threat level was set at 'critical' in the days after the attack but was downgraded Saturday to 'severe'.
The country remains on high alert, however, as officials caution that some suspects who helped Abedi may still be at large.