The service in which the Bishop of Sheffield will lead prayers for church organist Alan Greaves, who died after being attacked on his way to Midnight Mass on Christmas Eve, is due to begin shortly.
Dr Steven Croft earlier confirmed his presence in a tweet ahead of the service:
To St. Saviour's High Green this morning to be with the Church and community there following the murder of Alan Greaves, organist and Reader
More top news
Twitter is to end its video-sharing service Vine.
A Lib Dem peer has quit the party following her suspension for chairing a meeting at which Jews were allegedly blamed for the Holocaust.
A second man has been found guilty for the manslaughter of delivery driver Ali Qasemi who was killed for £52 worth of pizza.