
Kathryn Blair, 25, a barrister, was targeted as she walked down a central London street with her boyfriend and a group of friends, the BBC reported.
Police confirmed an incident involving two male suspects with a gun took place in central London on Monday evening.
"The victims were a man and a woman; the suspects were two males," they said in a statement, adding the incident was being linked with another attempted robbery nearby 30 minutes earlier.
"On both occasions a firearm was seen but not used - no shots were fired. None of the victims were injured and nothing was stolen during the incidents," police said.
It said investigations were under way but no arrests had been made. A spokesman for Tony Blair's office could not be reached for comment.
Blair, 60, was in office from 1997-2007 and involved Britain in the deeply unpopular invasion of Iraq, something which ultimately helped end his political career. Based in London, he now presides over a network of global consultancy businesses and charities.
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