It is not known whether the intelligence agencies informed the Army that one of its officers was seeking to connect with suspected al Qaeda figures, the officials said.
One senior lawmaker said the CIA had, so far, refused to brief the intelligence committees on what, if any, knowledge they had about Hasan's efforts.
CIA director Leon Panetta and the Director of National Intelligence, Dennis Blair, have been asked by Congress "to preserve" all documents and intelligence files that relate to Hasan, according to the lawmaker.
On Sunday, Senator Joseph Lieberman (D-CT) called for an investigation into whether the Army missed signs as to whether Hasan was an Islamic extremist.
"If Hasan was showing signs, saying to people that he had become an Islamist extremist, the U.S. Army has to have a zero tolerance," Lieberman told Fox News Sunday.
Source: ABC News