Police searching for a father and son who vanished in Malaga fear they may have "come to harm".
Sussex Police and Spanish authorities are continuing to look for Daniel and Liam Poole from Burgess Hill.
They disappeared after travelling to Malaga on March 31.
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Detective Chief Inspector Emma Heater said: "One possibility that must be considered, as they have not contacted family or friends, is that they have come to harm.
"We know that Daniel and Liam hired a grey Peugeot 308 car registration number 0254KTM when they arrived in Spain but this has not been returned to the car hire firm."
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She continued: "Also their luggage was left in their hotel together with their passports, suggesting this was not a planned disappearance .
"Their family are very concerned about them as they last heard from them on April 1, the lack of contact is out of character for the pair."
Anyone with information should call police on 101 quoting Operation Pheasant.
