[JURIST] US Senate Majority Leader Bill Frist [official website] and House Speaker Dennis Hastert [official website] on Tuesday called for a Congressional investigation into who leaked information on secret Central Intelligence Agency [official website] prison facilities in Eastern Europe rumored to be used to detain international terrorism suspects. Last week, the Washington Post reported that the CIA was holding suspected al Qaeda members in a covert prison system [JURIST report]. Both Frist and Hastert asserted Tuesday that if the leaked information on the prison system was accurate, it could have "far-reaching damaging and disastrous consequences" on the United States' ability to fight an effective war on terror. AP has more.