The young wife of a wealthy pensioner found murdered in Gambia has been videoed by police re-enacting the moment she allegedly killed him.

Ghana-born Kate West, 26, previously told Gambian police five Nigerians killed her 76-year-old husband William, from St Helen's Park, Hastings.

She has since confessed to knocking him unconscious before dragging him from their luxury home in the fishing village of Sanyang and setting him on fire.

Mr West disappeared more than three weeks ago. Gambia police's assistant superintendent Aziz Bojang said they were treating her claims with caution and could not rule out the possibility of accomplices being involved.

Officers filmed West on Saturday as she showed them how she crept up behind her husband of six years and repeatedly struck him until he fell unconscious. She claimed she then doused him in petrol and set him alight. Later, she told police how she gathered up his bones and ashes, put them in a sack and buried them at a nearby park.

She has since led officers to a bag just outside their property containing the charred remains of her husband.

Mr West met his second wife in 2000 and reportedly married her after a few months. His first wife Doris died in 1994.