© picture-alliance/dpa/M.BielechiFirefighters worked to put out the flames that engulfed the stall
A Polish market stall selling fireworks mysteriously burst into flames, injuring three people and sending knives from a nearby stall "flying through the air"
Three people were injured in the Polish city of Swinoujscie on Sunday when a street stall selling fireworks exploded, local media reported.
Firefighters tackled the blaze for more than an hour, with their job made even more difficult by further fireworks going off and knives from a neighbouring stall being thrown through the air, Polish broadcaster TVN reported.
Police are investigating the cause of the accident, which happened shortly after 2pm local time (1300 GMT).
The explosion is estimated to have caused around £43,000 worth of damage, as neighbouring stalls were also affected by the fire.
One resident said: "A huge tragedy happened. All the people ran away when it happened. We thought that a bomb exploded. What more can I say?"
A merchant from nearby stall added: "There was an instant blast. One after another. Boom, boom and lots of smoke. And a continuous roar."
"My stall is totally damaged. Everything. All my supplies," another stall owner said. "I have been working hard my whole life. Honestly. And this fireworks stand now, I don't even know whether they had any licence.
"They sell it all year round. Everything is burnt now. I don't have my job, nor the supplies, nor the money. Nothing."
Comment: Other fireworks related explosions this year include: