Shahadat Mollah Sohag, also known as Shamim or Shannan, is 21-years-old and is believed to be living in London.

He is described as key to the murder investigation of Ahmed Remon Hayder, who was found dead at his home on Monday February 1.

People are warned not to approach Sohag and and ports have been alerted to stop him leaving the country.

Ahmed, 27, who was known as Ray, died after suffering serious head injuries whilst he was in a flat above the Moon of India restaurant in Sutton Park Road, Seaford.

DCI Adam Hibbert, who is leading the investigation, said: "I have issued Shahadat's name and photograph because I believe he is key to this investigation and there is a strong possibility that he may be trying to leave the country.

"He is a Bangladeshi man who arrived in the UK six months ago.

"He has lived and studied in London and is not known by the victim's family and has no links with Sussex as far as we know.

"He is described as of medium build and has black short hair and brown eyes.

"We are working closely with our colleagues in London in an effort to trace him.

"An all ports warning has been issued to stop him leaving the country.

"If anyone recognises him and has information as to where he may be they should contact us.

"I would warn that no one approaches him but urgently contacts police on 0845 60 70 999 quoting Operation Scotsford or the independent charity Crimestoppers anonymously on 0800 555 111."

Sussex Police are working closely with the Metropolitan Police in an effort to trace Shahadat, who was seen on Thursday in the Tower Hamlets area.

He is not thought to have any connection with Seaford.

It is believed that more than one weapon was used in the attack but none has so far been found.

Forensic examinations are continuing at the scene.

Following an arrest on Friday, Mohammed Anhar, 33, of East London, appeared before Lewes Crown Court yesterday charged with the murder of his cousin Ahmed Remon Hayder, and aggravated burglary.

He has been remanded in custody and will appear at Lewes Court Court tomorrow (Wednesday February 10) for a preliminary hearing.