1.   After initial suspicions that right-wing terrorists had laid the bomb, the explosion was later attributed to the Apulian Mafia, known as the Sacra Corona.

2.   But its experts publicly have attributed the explosion to the presence of volatile grain dust in an underground conveyor-belt tunnel.

3.   CBS News quoted unnamed Pentagon officials as saying that it was premature to attribute the explosion to terrorists.

4.   Chinese investigators had attributed the explosion to a launch platform problem, and the review committee was supposed to analyze that conclusion for insurance purposes.

5.   Johnson once attributed the explosion of offense to the expansion effect, the dilution of pitching.

6.   Senior administration officials in Washington did not immediately attribute the explosion to an act of terrorism.

7.   The agency has attributed the explosion to a spark in the center fuel tank, but the pump bearings found in the wreckage off New York showed no wear.

8.   Security forces attributed the explosion, heard throughout the capital, to a car rigged with a powerful bomb.

9.   Some observers attribute the explosions to gangs trying to establish supremacy over criminal rivals in the wake of the jailing of gang leaders.

10.   State-run radio and television attempted to calm the city by repeatedly broadcasting announcements attributing the explosions to the work of the Cambodian Mines Action Center.