41.   According to the Interfax news agency, a propane gas canister in the car exploded.

42.   Although police said they did not know what caused the explosion, fire fighters said they found burned out propane gas canisters soaked in gasoline where the fire started.

43.   An organization calling itself the Cooperation of Anarchist Groups telephoned a private Athens radio station to claim responsibility for burning three cars using propane gas canisters.

44.   Authorities later discovered the car was packed with Molotov cocktails, gas canisters a loaded rifle and bags of nails, said local prosecutor Yves Saint-Macary.

45.   Authorities found bits of a gas canister at the blast site Tuesday, a government source said on condition of anonymity.

46.   Authorities found bits of a gas canister at the blast site Tuesday.

47.   Battut confirmed that investigators found pieces of a blue gas canister, the type commonly used by campers, in the wrecked train car.

48.   Battut confirmed that pieces of a camping-style gas canister believed to have caused the explosion were found in the wrecked train car.

49.   Battut confirmed that pieces of a camping-style gas canister were found in the wrecked train car.

50.   But officials said the explosion came from a gas canister loaded with nuts and bolts, similar to others planted since late July.