A college student has been shot dead while playing Pokemon Go at a San Francisco tourist attraction.

A five-year-old boy who has battled leukaemia for years fulfilled his wish to be his favourite superhero – taking on foe after foe around San Francisco dressed in a black Batman costume.

Hours after a meteor exploded over Russia and injured more than 1,000 people and an asteroid passed relatively close to Earth, people in California reported seeing an unusual flash of light over the San Francisco Bay area that left many startled and thrilled.

An American expatriate school teacher said publicly today he was with JonBenet Ramsey when she died in what he called “an accident", a stunning admission after a decade without answers in the six-year-old’s murder.