Similarities in the bomb design allowed investigators to conclude that this was the work of the same perpetrator.

Nor is it clear whether Iraq, which denies the accusations, would allow such investigators to enter its territory.

Azerbaijan has, to date, refused to allow investigators access to the site.

Later in the evening, the phone was used several times, the couple said, allowing investigators to narrow the search to Hempstead.

He also allowed investigators to wiretap a telephone in his home, the sources said.

Those leads helped implicate the three coalitions and allowed investigators to track down the construction companies that were being victimized.

Clues from the bombings have allowed investigators to piece together a portrait of the suspect.

They said the 16 snakes, including 4 poisonous ones, were found when the apartment's owner allowed investigators to enter.

This would allow Russian investigators to pinpoint how far the missile could have flown.

"It was a very successful effort that allowed investigators to narrow the scope of the investigation," the scientist said, declining to elaborate.