1. Other observers have said the disaster likely was caused by a torpedo explosion. 2. But what prompted the torpedo explosion remains unclear. 3. A preliminary report in February said the disaster was caused by a torpedo explosion resulting from the use of volatile fuel. 4. But Vladimir Kuroyedov was cautious not to pronounce a torpedo explosion as the sole, definitive cause of the undersea tragedy. 5. Russian navy chief Vladimir Kuroyedov was cautious not to pronounce a torpedo explosion as the sole, definitive cause of the fatal blasts. |