The Obama administration wants to require U.S. banks to report all electronic money transfers into and out of the country, a dramatic expansion in efforts to counter terrorist financing and money laundering.

Officials say the information would help them spot the sort of transfers that helped finance the al-Qaeda hijackers who carried out the Sept. 11, 2001, attacks. They say the expanded financial data would allow anti-terrorist agencies to better understand normal money-flow patterns so they can spot abnormal activity.

Financial institutions are now required to report to the Treasury Department transactions in excess of $10,000 and others they deem suspicious. The new rule would require banks to disclose even the smallest transfers.