Organist Alan Greaves murder: Police in CCTV appeal Published duration 7 January 2013

media caption Mr Greaves was found on a pavement near his home

Police have released CCTV footage of two men they want to speak to about the murder of a church organist on Christmas Eve.

Alan Greaves, 68, of High Green, Sheffield, died three days after he was attacked while walking to St Saviour's Church for midnight mass.

A £10,000 reward has been offered by Crimestoppers for information leading to the conviction of his killer.

South Yorkshire Police showed the CCTV footage at a news conference.

'Not stopped crying'

Det Supt Matt Fenwick urged the men in the footage, or anyone who knows them, to come forward.

He said the footage was captured on camera near the scene shortly before the incident.

image caption Mr Greaves was a father of four

Mr Greaves, a father of four, was found with a head injury near his home on Greengate Lane at about 23:15 GMT on 24 December.

Two men arrested on suspicion of murder have been released on police bail while inquiries continue.

BBC Look North's John Cundy said he understood they were not the two men seen in the CCTV.

Mr Fenwick said there appeared to have been no motive for the attack.

"Alan retains all his property," he said.

"Nothing is missing and my inquiry remains very open in relation to identifying a possible motive for this attack."

The officer said there were more than 50 officers working on the case and urged the two people in the footage to contact police.

media caption Det Supt Matt Fenwick of South Yorkshire Police showed the CCTV footage at a news conference

"I am absolutely convinced that someone will look at this footage and know who these people are - a mum, a dad, a brother, a sister, another relative, a close friend," he said.

"Alan Greaves deserves your help. Alan Greaves's family deserves your help. Please make that call."

At a service following her husband's death, Mr Greaves's wife, Maureen, said she had wept over the "evil that has been done".