We have today (March 28) arrested an 11-year-old boy and a 13-year-old boy on suspicion of arson in connection with the fire at building in St Mary’s Street on Tuesday.
The fire was reported at 2pm on March 26 at a vacant commercial property under construction in St Mary Street and we attended with our colleagues from Hampshire Fire and Rescue Service.
Due to the severity of the fire nearby homes and businesses were evacuated as a precaution.
There have not been reports of anyone being injured as a result of the fire.
We previously released an image of three people seen on the roof of the building prior to the fire starting. These people have since been identified and have been eliminated from the investigation.
The two boys arrested today, both from Southampton, remain in police custody at this time.
As the investigation into the fire continues, so does our appeal for witnesses.
If you or anyone you know was in or near the building before the fire started, any information you have could be vital to our investigation so it is important that you contact us.
We know that a lot of people were filming the fire, so if anyone has any mobile phone footage that they haven’t yet given to us, please call.
Anyone with information is asked to contact us on 101, quoting 44190105129, or Crimestoppers anonymously on 0800 555 111.