US President Barack Obama said Thursday there was "no dispute" that Iran was involved in an alleged terrorist plot against the Saudi ambassador in Washington that was uncovered this week, DPA reported.
"We would not be bringing forward a case unless we knew exactly how to support all the all facts contained in the indictment," Obama told a press conference during a visit by South Korean President Lee Myung-bak.
The action is part of a "pattern of dangerous and reckless behaviour by the Iranian government," Obama said, but declined to specify which officials in Tehran may have known about the plot.
Obama said he would "take any options off the table in terms of how we operate with Iran," but indicated the United States would continue to pressure Tehran, including pursuing tougher sanctions.
The United States filed charges Tuesday that Iranian agents planned to engage a Mexican drug cartel to assassinate the Saudi Arabian ambassador to the US, Adel A Al-Jubeir, possibly through a bombing at al-Jubeir's favourite Washington restaurant.