Hampshire and Isle of Wight Police

Firefighters spent more than 22 hours tackling the blaze which left the building partially collapsed.

The woman remains in police custody, with a 36-hour warrant of further detention granted on Monday.

A woman, 23, and a man, 54, are arrested on suspicion of murder following a death in Southampton.

The Independent Office for Police Conduct is investigating four Hampshire constables.

Crowds gathered outside Southampton's police station on 2 June before moving to the Portswood area.

Rrahim Statovci, 23, was jailed for running a Class A drugs line between Slough and Basingstoke.

Allan Grimson was already serving a life sentence for the murders of two men in the 1990s.