WASHINGTON (AP) _ The U.S. embassies in Bulgaria and Romania were closed indefinitely Thursday after threats against them.

State Department spokesman Richard Boucher said embassy officials wanted to review their security arrangements along with ``information about possible threats.''

The threats originated in the Middle East, said one U.S. official, who spoke on condition of anonymity.

The embassies could be reopened on Friday, depending on the results of security checks.

In Bucharest, television station Antenna 1 reported that Romanian intelligence services sent dozens of security troops to the embassy area.