A one million euro reward has been offered to anyone who gives ‘a reliable clue’ as to the whereabouts of a missing teenage girl.

Put up anonymously the reward will only be available until April 17 and any information given will be strictly confidential.

Marta del Castillo, 17, from Sevilla, is thought to have been killed on January 24 2009 and may have been buried.

Police have searched the Guadalquivir river, Sevilla’s main rubbish tip in Alcalá de Guadaira and near the chief suspect’s home in Camas but with no success.

The cash has been placed with a lawyer in Córdoba and will only be paid if the police confirm the accuracy of the information given.

Please call 697 249 622 with any information.