Iraqi President Jalal Talabani says he has postponed his trip to Iran because the airport in Baghdad is closed due to a security clampdown in the city.
Mr. Talabani had planned to leave for Tehran on Saturday to speak with Iranian President Mahmoud Ahmadinejad on the situation in Iraq.
The Iraqi president says he will go on Sunday if the airport re-opens.
Meanwhile, politicians loyal to radical Shi'ite cleric Moqtada al-Sadr have threatened to boycott Iraq's unity government if Prime Minister Nouri al-Maliki meets with President Bush next week in Jordan.
The White House says the meeting will go on as planned despite the threat. Mr. Bush and Mr. Maliki are scheduled to meet on Wednesday and Thursday in the Jordanian capital, Amman, to discuss the war in Iraq.
U.S. Vice President Dick Cheney is scheduled to fly to Saudi Arabia for talks on Saturday with King Abdullah.
Issues on the agenda are expected to be the war in Iraq, the Israeli-Palestinian conflict and the situation in Lebanon.
Moqtada Al-Sadr's followers hold six Cabinet seats and have 30 members in the 275-member Iraqi parliament.
Information for this report is provided by AP, AFP and REUTERS.