POLICE and army operatives have detonated a number of vintage fire extinguishers at a site in Musselburgh as part of a routine exercise.
It comes after residents reported hearing a series of loud bangs in the area near the Tesco superstore.
However, authorities have confirmed the blasts were small, controlled explosions carried out by the Explosive Ordnance Disposal (EOD) to safely destroy the unstable devices.
Vintage fire extinguishers often use a mechanism containing a small explosive charge which is triggered to disperse flame-retardant powder by intense heat.
The devices can reportedly become volatile if left unattended.