Nicola Morgan MP described to ITV News how she heard an "almighty bang" and saw "clouds of thick black smoke" as she walked towards Vauxhall tube station.
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Ciaran Williamson and two friends were hit by the gravestone while playing in Craigton cemetery in the Cardonald area of Glasgow.
Attorney General Loretta E. Lynch spoke at a press conference earlier following arrests made in Zurich.
ITV news has learned that former Thomas Cook CEO Harriet Green will donate to charity a third of shares she is entitled to.