rucksack

He is seen taking a photograph before leaving, carrying a rucksack.

It is not known what he was wearing when last seen, but police said he was an experienced hillwalker and was likely to have been wearing walking boots, a waterproof jacket and carrying a rucksack.

He was carrying a rucksack with an airgun that he planned to use to keep worshippers inside the building after he set it on fire using aerosol cans.

"He's there, dressed as he was on the day, holding the rucksack, just with his hand above it, about to detonate it again."

Another veteran said operators would carry AK-47 rifles which had a folding stock because they were easier to fit into their rucksacks and "easier to bring onto a target and plant by a body".