The moment the 'missile' hit the Ukranian plane over Tehran

World leaders have suggested it's "highly likely" a Ukrainian plane that crashed near Tehran was brought down by an Iranian missile.

Iran has denied the claim and invited US, Canadian and French authorities to take part in the crash investigation.

All 176 people on board died.

Sky's defence and security correspondent Alistair Bunkall walks us through footage reportedly showing the missile hit.

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