Officials have confirmed that two men arrested by armed police in London are suspected Basque terrorists.
Antonio Troitino Arranz and Ignacio Leron Sanchez are described as senior members of ETA by the Spanish interior ministry.
They were arrested at a residential address in Hounslow, west London.
More top news
The boy was found unconscious and in cardiac arrest and was rushed to hospital where he died.
The victim, who was wearing her uniform at the time, was found knocking on doors nearly four hours after she was abducted.
There will be gales across Scotland and northern England this morning, but these will gradually ease through the afternoon.