美國議員追究聯邦各機構間的情報交流問題

U.S. lawmakers have raised concerns about the sharing of intelligence among federal enforcement agencies, as investigators continue to piece together last week's deadly bombing of the Boston Marathon.

Senator Lindsey Graham said Tuesday that the FBI told him it did not know last year that one of the bombing suspects, Tamerlan Tsarnaev, traveled to Chechnya and Dagestan.

Homeland Security chief Janet Napolitano told the Senate Intelligence Committee that her agency knew of the six-month trip, but that an FBI alert on Tsarnaev had expired by the time he returned.

The FBI had interviewed Tsarnaev in 2011 at the request of Russia, but found nothing to connect him to terrorism at that time.

After a closed-door briefing by FBI officials Tuesday, Republican Senator Susan Collins said there are problems with sharing of "critical investigative information" within and among different agencies.美國國會議員對聯邦執法機構之間情報交流問題表示關注，同時調查人員繼續瞭解上星期波士頓馬拉松賽爆炸案的情況。

參議員格雷厄姆星期二說，聯邦調查局去年不知道波士頓爆炸案嫌疑人之一塔梅爾蘭•薩納耶夫曾經去過車臣和達吉斯坦。

美國國土安全部部長納波利塔諾對參議院情報委員會說，國土安全部知道塔梅爾蘭•薩納耶夫這次爲期六個月的出行，但聯邦調查局針對薩納耶夫的警報在他返回美國時已經期滿失效。

聯邦調查局曾於2011年應俄羅斯的要求與薩納耶夫進行面談，但當時並未發現他與恐怖主義有任何聯繫。

在星期二舉行的聯邦調查局官員閉門情況介紹會上，共和黨籍參議員科林斯說，美國政府各機構之間在交流“關鍵調查情報”過程中存在問題。