81.   The blast ignited a fire that emergency workers later extinguished.

82.   The blast ignited a fire that quickly swept through the bus, the Hong Kong-based center said.

83.   The fire apparently was ignited by underground coal seams that had been burning for years, officials said.

84.   The fire was ignited by explosive chemicals being mixed by Yousef, authorities said.

85.   The fire was apparently ignited by underground coal that had been burning for years, officials said.

86.   The fire was ignited by welders working inside a building housing vehicles at the base in Nizhny Novgorod, the Interfax news agency said.

87.   The fires were ignited naturally when top layers of the coal reserves became exposed to air.

88.   The dummy bomb that ignited the fire landed in Bass River State Forest, more than a mile from its target, the Warren Grove Range.

89.   The fire apparently was ignited when molten metal from welding work being done outside the airport dripped onto plastic-covered electrical cables.

90.   The fire apparently was ignited when molten metal from welding work outside the terminal dripped onto the plastic-covered electrical cables.