Inmates have lit two new fires as unrest continues at a Melbourne remand centre in the worst prison riot in Victoria's history.
Few pockets of the Metropolitan Remand Centre were left untouched as hundreds of prisoners went on the rampage on Tuesday over a statewide prison smoking ban.
The damage is estimated to run into millions of dollars.
Prisoners broke doors and furniture, set fires, wrecked staff areas, dragged bedding into a courtyard and set it ablaze, and smashed toilet bowls and basins.
Two new fires were lit inside cells on Thursday following similar blazes at the centre and at the nearby Port Phillip prison and Dame Phyllis Frost women's prison since Tuesday.
No one was injured and the centre remains in lockdown. Family visits have been suspended indefinitely.
