Police conduct early-morning raids at two houses in connection with an alleged firebombing and arrest a man suspected of being a firebomber. Multiple reports say investigators discover homemade explosives during the searches. The raids occur across two residences, where police locate the materials as part of the inquiry into the firebombing incidents. Police do not attribute the explosives to an outlet beyond describing them as homemade, and they do not provide further technical details in the available summaries. The man is taken into custody following the operation, which is presented as an investigation step tied directly to the alleged firebombing. Authorities treat the findings as significant in the context of the probe, indicating the searches uncover additional potential evidence or risks related to the alleged attacks. The reports focus on the discovery during the raids and the resulting arrest, with no additional confirmed information on charges, the extent of the explosives, or any further suspects in the summaries provided.