[kach22i]

https://www.bbc.com/news/world-middle-east-27258303

The cans of rotten Baltic herring, which had already expanded due to the powerful fermentation gases inside, were heated by the fire and began to explode over a period of six hours.............

Reports say the fire crews initially believed the explosions were caused by propane bottles.

Surstromming is a traditional dish from northern Sweden. The Baltic herring is fermented in barrels for months before being put in tin cans, where the fermentation process continues.

Several major airlines have banned the fish, external, arguing they are pressurised goods and must be classified as potentially explosive.

The delicacy is so foul-smelling that it is often eaten outside.