A man arrested over a warehouse fire in Warwickshire in which four firefighters died has been released on police bail.
The 53-year-old, arrested on Wednesday over a vegetable packing plant fire at Atherstone-on-Stour in November 2007, was released pending further inquiries.
A 47-year-old man also arrested on Wednesday was still being questioned.
Both men were arrested on suspicion of gross negligence manslaughter and were also questioned in relation to breaches of the Health and Safety at Work Act.
The 53-year-old man, from the south of the county, will return to a police station in the county at a later date.
The 47-year-old man, from the north of the county, was released on police bail on Wednesday night to return to a police station in Warwickshire on Thursday morning.
Ten men held earlier in the year in connection with the incident remain on police bail.
Eight were arrested on suspicion of gross negligence manslaughter and two on suspicion of misconduct in a public office.
The bodies of Ashley Stephens, 20, John Averis, 27, and Darren Yates-Badley, 24, were found in the charred remains of the factory in Atherstone-on-Stour.
Ian Reid, 44, died in hospital after the fire.