The police are now treating a fire which caused extensive damage to a GAA club in Derry as suspected arson just a day after saying it was not being treated as suspicious.
The blaze broke out at Sean Dolan's in Creggan in the early hours of Wednesday morning.
Police initially said they believe it started accidentally but after reviewing CCTV footage last night, the investigation is re-open.
A spokesperson for the PSNI says a senior officer will review every action taken by police from the first call received about the fire, evidence taken, CCTV footage viewed and lines of inquiry followed up by the investigating officers.
Sinn Fein's Raymond McCartney says the initial police reaction raises serious questions: