Surveillance video of the man suspected of bombing a tourist bus at an airport in Bulgaria has been released as investigators attempt to identify him.
The footage shows a long-haired man carrying a large rucksack and a smaller carry-on bag, walking close to a Thomson stand at Burgas Airport.
Investigators are meanwhile scanning DNA samples from the fingers of the suspected bomber in a bid to trace his identity.
Officials said he was carrying a fake passport, which claimed he was travelling from the state of Michigan in the US.
More top news
Scott Morrison was magnanimous in defeat but Mr Johnson was quick to say: 'We take nothing for granted.'
Police used tear gas to clear the streets and arrested more than 50 people in the latest incidents.
Engineers from the UK Naval Engineering Science and Technology Forum were asked to create ideas to kit out a mid-21st century assault.