A Polish man who allegedly made bombs and posted videos of them exploding on the internet has been arrested, police said Thursday, dpa reported.
The 20-year-old was arrested near the southern town of Muszyna, after police monitoring the internet saw the videos showing the explosions in a forest.
Police said they found two bombs and chemicals used in the making of bombs during a search of his garage.
Last week, a man was arrested in Krakow in connection with a four bomb attacks since late June that injured five people. The bombs had been placed in apartment buildings in the city.
Police said they had found the 38-year-old suspect in possession of enough materials to make around 100 bombs.