Two people have been arrested at Heathrow Airport on suspicion of committing terrorism offences.
A man and a woman were held at 8.30pm yesterday after arriving on a flight into the airport.
The pair, both aged 26, were arrested by officers from the Metropolitan Police's Counter Terrorism Command on suspicion of the commission, preparation or instigation of acts of terrorism.
They were taken to a central London police station where they remain in custody.
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The pair, believed to be the boy's mother and stepfather, were held after the five-year-old's lifeless body was discovered in a lagoon.