obomba, serving his masters....again
In an executive order, Mr Obama said he was freezing all Iranian government assets held or traded in the US.
On Sunday, Mr Obama said the US and Israel were "in lockstep" in their policy towards Iran.
Concerns have grown in Israel and the West that Iran is developing nuclear weapons, although Tehran says its nuclear programme is entirely peaceful.
The new US sanctions include blocks on the Central Bank of Iran, imposed "in light of the deceptive practices" the bank to conceal transactions already banned by previous sanctions.
The curbs were also prompted by Iran's "deficient" efforts to combat money-laundering, the executive order said.