By Q Radio News
A man has been arrested in connection with the murder of RUC officer Michael Ferguson in Derry/Londonderry back in 1993.
Detectives from the PSNI's Legacy Investigation Branch have detained a 51-year-old suspect under the Terrorism Act.
He’s being questioned at the Serious Crime Suite at Musgrave Police Station.
Constable Ferguson, from Omagh, was shot twice at close range in the back of the head by an IRA gunman in Shipquay Street on 23 January 1993.

The Catholic policeman, who was 21 when he was killed, was on duty at the time and was taken to Altnagevlin Hospital but died from his injuries.
A PSNI spokesperson said: ''Detectives from PSNI Legacy Investigation Branch, investigating the murder of police officer Michael Ferguson in January 1993, have today arrested a man in Derry/Londonderry as part of their ongoing enquiries into the killing.
''A 51-year-old man has been arrested under the Terrorism Act and taken to the Serious Crime Suite at Musgrave Police Station for questioning.''
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