A man wanted in connection with the murders of a family of four in Northamptonshire is believed to be in Morocco.
Police hunting Chinese businessman Anxiang Du, 53, have travelled to Spain in the investigation into the deaths of university lecturer Jifeng "Jeff" Ding, his wife Ge "Helen" Chui and their two daughters Alice, 12, and Xing, 18.
The family were found stabbed to death at their home in Wootton on May 1 last year.
Detective Chief Inspector Tom Davies said: "We know that at an early stage in the investigation - in the first few days before he was declared the prime suspect - Anxiang Du had the opportunity to leave the country.
We now strongly believe Anxiang Du left the UK soon after the murders and travelled from Victoria bus station, London, on a coach to Paris, Gallieni. After this he travelled through France into Spain, most likely through the use of public transport.
His final journey was to Algeciras in Spain where he caught a ferry from there into Tangier, Morocco."
The Northamptonshire Police are now working closely with the Moroccan police and have the required extradition papers to bring Mr Du back to England, if he is found in the country, to face appropriate charges.