Police investigating the London Bridge terror attack are reported to have found petrol bombs
Sky News tweeted that sources had said Metropolitan Police officers were "examining what appears to be Molotov cocktails found in the van used by the London Bridge attackers".
Seven people were killed and 48 injured when three men ploughed a hired van into pedestrians on London Bridge and then went on the rampage in nearby Borough Market, attacking pub and restaurant-goers with knives before being shot dead by armed police.
At least a dozen bottles filled with clear liquid, which had rags stuffed in their tops, were found in the back of the hired van, and police had treated them as though they were petrol bombs, Sky News said citing unnamed sources.
The aftermath of the London Bridge Attack
Scotland Yard refused to comment on the Molotov cocktails reports, saying it was not prepared to discuss any evidence found at the scene.
Scotland Yard Commissioner Cressida Dick said authorities were confronting a "new reality" after three deadly assaults hit the UK in 10 weeks.
ISIS has claimed the London Bridge rampage while the attack has sparked fears Britain is in the grip of a spate of copycat incidents.
In the latest outrage, three terrorists killed seven victims and injured dozens more in the London Bridge area on Saturday night.
Hundreds cowered in pubs and restaurants, barricading themselves inside as the terrorists stalked the street.
Met Police chief Cressida Dick with London Mayor Sadiq Khan
The attackers, wearing fake suicide vests, were shot dead by eight officers after police opened fire with a hail of 50 bullets.
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Of the 48 people taken to hospital, 36 are being cared for in London hospitals with 18 in a critical condition.
On Monday evening, a crowd of all ages and races stood quietly for an impeccably observed minute's silence at a vigil a short walk away from the scene of Saturday's bloodshed.
London mayor Sadiq Khan warned extremists they will never win as mourners gathered at the service in Potters Fields Park, near London's City Hall.