1.   Along with Yemeni authorities, the FBI, the Navy and a panel appointed by Defense Secretary William S. Cohen are investigating the terrorist attack.

2.   An even less helpful stance was taken by the Yemeni authorities after the attack on the USS Cole.

3.   A senior officer said that the Yemeni authorities had also turned over to American investigators videotapes from security cameras in the harbor.

4.   But they say they do know that Yemeni authorities conducted searches of at least eight safe houses and other locations before allowing the FBI to inspect them.

5.   During the trial, Yemeni authorities accused Abu Hamza of being allied with a Yemeni extremist group known as the Islamic Army of Aden-Abyan.

6.   For several days, the area where these activities are said to have taken place was sealed off to reporters by Yemeni authorities.

7.   No one has been charged in the bombing of the Cole, although Yemeni authorities have indicated they are poised to indict at least two people.

8.   Recently, however, in response to U.S. pressure, Yemeni authorities have begun cracking down on terrorist cells.

9.   The account of the aborted attack came from a suspect being questioned by Yemeni authorities, who have shared the information with American investigators, the officials said.

10.   The dispute has prompted speculation among some FBI officials that Yemeni authorities may want to hide their own contacts with shadowy figures.