A Chilean judge on Saturday ordered a volunteer firefighter and a former forestry official detained for allegedly planning and causing a mammoth forest fire in the Valparaiso region that caused 137 deaths and made 16,000 people homeless in February. The court in Valparaiso ruled the two men, who were arrested Friday, could be held for 180 days while they are investigated.

The chief prosecutor in the case, Osvaldo Ossandon, told journalists that the main suspect is Francisco Mondaca, a 22-year-old volunteer firefighter in Valparaiso who is accused of physically starting the fire. He said flares and fireworks were found in Mondaca`s vehicle.