“The public should be in no doubt that there is a large threat”
painstakingly assembled -- likely with assistance, according to officials and experts.
Ten men are now in custody in connection with the attack, including Abedi’s brother and father in Libya.
Police have revealed little about the explosive. But photographs from the bomb scene leaked to The New York Times -- to the fury of British officials -- suggest Abedi carried “an improvised device made with forethought and care”, the newspaper wrote.
The images showed shreds of a blue Karrimor backpack, metal screws and nuts, the remains of a powerful battery, and an apparent hand-held detonator.
Britain’s The Times newspaper said yesterday said Abedi was believed to have planned the attack for at least a year, buying nails and screws for the device from hardware stores.
Security sources fear he may have also made a second device which is now in the hands of other jihadists, The Daily Telegraph reported.
After his return from Libya, Abedi was seen on security cameras last Friday buying the Karrimor rucksack at a Manchester shopping centre, the Telegraph said. – Reuters, AFP