8 August 2012 Last updated at 07:29 ET

Joseph Shann disappearance: Two men bailed over murder

There have been no confirmed sightings of Mr Shann since he disappeared

Two men arrested on suspicion of murdering a West Yorkshire man who went missing more than 18 months ago have been released on police bail.

Joseph Shann, who was 37 at the time he disappeared, has not been seen since 10 December 2010 when he left his sister's house on Ecclesburn Street, Leeds.

Despite police efforts to trace him, there have been no confirmed sightings of Mr Shann since that time.

The two men from Leeds, aged 39 and 45, were arrested on Tuesday.

'Clearly concerned'

On the day he went missing, police said Mr Shann withdrew just over £100 from his bank account at the Vicar Lane branch of Barclays to buy Christmas presents.

Analysis of the bank account has shown there has been no further activity since then, despite additional funds being available later that month.

Det Ch Insp Jon Morgan, from the Homicide and Major Enquiry Team, said police were "clearly concerned" for Mr Shann's safety .

"Officers have never let up in the search for Joseph but I still need more information," he said.

"I am appealing directly to anyone out there who knows what has happened to him to get in touch.