A man has been arrested in connection with the brutal murder of a Brentford resident who was gunned down in what was believed to be a “turf war” between rival gangs.

Dean Tully, 37, was shot dead after two men burst into a flat in the Haverfield Estate in Brentford on January 25, 2006.

The new arrest on January 9 brings the total number people questioned about Mr Tully’s murder to four, but no-one has yet been charged.

However, Detective Chief Inspector Mick Duthie of the Met Police’s Serious Crime Command said Mr Tully’s family remained hopeful that those involved in his murder would be caught.

He said: “Dean’s family are still very hopeful that something will come out of the investigations.

“I’m in no doubt people know who may have been involved. People are very afraid about who has committed the crime but we have measures we can take to protect people and protect peoples’ families.

“We’re committed to doing what we can to solve this case. No stone will be left unturned but unfortunately were are getting fewer stones.”

Police believe Mr Tully’s death was the result of a “turf war” between gangs over class A drugs.

It was known the flat where Mr Tully stayed was used for drugs, although it was not thought he was involved in the dealing of the illegal substances.

DCI Duthie hoped a £20,000 reward for people who can offer information which will lead to the prosecution of those involved, would encourage people from the community to come forward.

He said: “We know people know who did it we just want them to come forward.”

The man arrested has been released on bail until March.

Anyone with information is urged to contact the incident room on 020 8721 4155 or call Crimestoppers anonymously on 0800 555 111.