premise: "Hundreds of people have been interviewed" and investigators probably have to take quite a long time to compile evidence in the two bomb blasts so as to reach any conclusion, he said. Freeh flew to Washington immediately after the press conference.
  U.S. President Bill Clinton said Thursday that he had ordered the strikes after receiving "convincing evidence" that the terrorist facilities the U.S. raided in Sudan and Afghanistan had played key roles in the bomb attacks in capitals of Kenya and Tanzania.
  However, Freeh said although the bombing investigators from the FBI, Kenya and Tanzania have been working very hard and made "very good progress" on the case, so far no conclusion or decision can be made at this stage.
  After touring Tanzanian capital Dar es Salaam Thursday and meeting with Kenyan police leaders Friday morning, the FBI chief also said that he is very satisfied with the close and effective cooperation among the FBI agents and the police in Kenya and Tanzania.
   What does the strikes refer to?
hypothesis: the bomb attacks in capitals of Kenya and Tanzania