51.   He said an explosion at the factory could release toxic gases and threaten people in the area.

52.   Ikuo Hayashi, a former top official of the Aum Shinri Kyo cult, has testified that chief cult scientist Hideo Murai told him to release the gas.

53.   In the novel, an Arab terrorist discusses the idea of releasing deadly gases into the Paris and London subway systems, though the idea is never carried out.

54.   Mining coal releases volatile gases trapped in the earth, making the industry inherently dangerous.

55.   Mysterious noxious gases have been released several times in train stations and other public places, sickening hundreds.

56.   No evidence on who released the gas was found near the site, said Kanichi Arai of the Gunma prefectural police.

57.   Some radioactive gases were released.

58.   The gas was released late Saturday when a brush fire ignited a giant sulfur stockpile at the AECI chemical factory, police and company official said.

59.   The gas was released late Saturday when a brush fire ignited a giant sulfur stockpile at the AECI chemical factory, police and company officials said.

60.   The gas is released on a street corner from a pressurized cylinder with a fan.