Beds Police have released a CCTV image of a man they want to speak to regarding a fire at a Dunstable garage block.
Offenders set fire to the block off Langdale Road at about 12.20pm on Sunday, July 26.
Police want to trace a man who was seen entering Tesco after the incident.
PC Allan McCarney, investigating, said: “We are keen to trace this man as we believe he could have important information about the fire.
“I would also appeal to the man directly to come forward to police.”
Anyone with any information should call PC McCarney on 101 or Crimestoppers, anonymously, on 0800 555111.