A woman questioned in connection with the abduction and murder of Jean McConville in 1972 has been released.
The 57-year-old woman was arrested in west Belfast this morning.
A report has been sent to the Public Prosecution Service in Northern Ireland.
The abduction, murder and secret burial of Mrs McConville in 1972 was one of the most notorious incidents of the Northern Ireland Troubles.
Nobody has ever been charged with her murder.
Veteran republican Ivor Bell was charged in connection with the killing in March.
The 77-year-old, from Ramoan Gardens in west Belfast, faces counts of aiding and abetting the murder and of IRA membership.