A massive manhunt has been launched after a man was found dead on a riverside bench, with house-to-house enquiries taking place and extra police patrols deployed to find his killer.

The murder investigation was launched after the man in his 50s was found dead on the canal footpath near the River Nene, Northampton, on Friday.

Northamptonshire Police were called by East Midlands Ambulance Service at around 6.30pm after the man was discovered on a bench behind Auctioneers Court.

The River Nene is shut off to pedestrians and river traffic between London Road bridge and Nunn Mills Road bridge and will likely remain closed until Tuesday evening while the search takes place.

The police are currently appealing for witnesses or CCTV footage of the nearby area, specifically from those living in apartments that overlook the river.