ISIS has claimed responsibility for the depraved attack in London Bridge as chilling video shows three jihadis calmly strolling past a pub while in the midst of the van and knife rampage that killed seven and critically injured 21.

The twisted killers are seen calmly walking through Borough Market moments before they launched a stabbing attack on pubgoers while shouting "this is for Allah", having already driven a van into crowds.

Terror group ISIS has claimed responsibility for the mass killing more than 24 hours after the atrocity through their affiliated news agency Amaq.

Despite the warped death cult's claims, Amaq recently claimed that an arson assault on a casino in Manila was ISIS-related. But CCTV footage released shortly after suggested the incident was a botched robbery and not terror related.

On Saturday on London Bridge, a three-strong terrorist gang wearing fake suicide vests were shot dead by armed police after inflicting eight minutes of terror on those enjoying a summer's evening in the capital, killing seven and injuring 48 - with 21 still critical.