JUDY WOODRUFF, CNN ANCHOR: There are new concerns about terrorism nearly three weeks after the USS Cole attack. The Pentagon is increasing the alert level for more U.S. forces. CNN's military affairs correspondent Jamie McIntyre reports.</s>JAMIE MCINTYRE, CNN CORRESPONDENT (voice-over): The Pentagon has added Kuwait and Saudi Arabia to the growing list of Persian Gulf countries where U.S. troops are on the highest state of alert for possible terrorist attack.</s>KEN BACON, PENTAGON SPOKESMAN: It is due to credible threat information involving unspecified targets.</s>MCINTYRE: Pentagon sources say the threats were vague, but came from people with a proven track record. One U.S. official said one threat was linked to the organization of accused terrorist leader Osama bin Laden. The addition of Kuwait and Saudi Arabia brings to five the number of countries at Threat Condition Delta, a list that includes Bahrain, Qatar, and Yemen. Meanwhile, the investigation into who bombed the USS Cole remains frustrated by Yemen's refusal to allow the FBI to question witnesses and suspects. U.S. officials tell CNN that negotiations are underway on a written agreement to allow U.S. investigators more access. A sign of the current tensions, this Navy videotape of the USS Cole had to be transmitted from a ship-board video conference center because Yemen refused to allow U.S. helicopters land in Aden. This tape shows the USS Cole perched atop the huge transport ship Blue Marlin diagonally so its sonar dome can hang off the bow. Holes had to be cut in the Blue Marlin's deck for the Cole's propellers that will add $1.5 million to the $4.5 million price tag of bringing the ship home. (on camera): Unlike threats last week in Bahrain and Qatar, which were very specific but lacked credibility, Pentagon sources sat the latest threats are very credible, but lack any specific target. Still, these days, all threats are being taken seriously. Jamie McIntyre, CNN, the Pentagon.
U.S. Forces in Saudi Arabia, Kuwait Placed on Highest Alert