Ding murders: Suspect thought to be in Morocco
Detectives hunting a man wanted for murdering a family of four in Northampton believe their prime suspect is in Morocco.
Police said following a "major breakthrough" they thought Anxiang Du, 53, was living in Tangier.
The bodies of Jifeng Ding, his wife Helen and their two daughters, Alice, 12, and Xing, 18, were found at their home in Wooton on 1 May last year.
Mr Du was last seen on CCTV in London on 30 April.
Det Ch Insp Tom Davies, who is leading the investigation said: "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.
"We believe that having made his way to Morocco, Mr Du is still there."
Northamptonshire police are now working with several other agencies, including Interpol, to find Mr Du.
They said documents had already been drawn up by the Moroccan police to ensure that if Mr Du was located he would be brought back to England to face charges.
Officers have now travelled to Madrid to make appeals for information in Spain and North Africa.
Mr Davies added: "This visit to Madrid will allow us to spread the message wide and clear that we believe Mr Du used a specific route, will most likely be in Morocco and we are on the trail to find him.
"We want the communities in those countries to be on alert and call the police if they have any information."
Officers are continuing to work with Chinese Embassies in London, Spain and Morocco to identify Chinese communities in these countries and ensure they are aware of the manhunt and are able to assist in the investigation if they have any information.
In March officers investigating the case travelled to China where they met the family of the victims.
Four people were arrested in April on suspicion of conspiracy to assist an offender and were released on bail pending further inquiries.
The reward for information over the murder was increased to £25,000 earlier this year.