Iran rejects U.S. action in Iraq, ISIL tightens Syria border grip

ANBAR Iraq (Reuters) - Iran's supreme leader accused the United States on Sunday of trying to retake control of Iraq by exploiting sectarian rivalries, as Sunni insurgents drove towards Baghdad from new strongholds along the Syrian border.

Ayatollah Ali Khamenei's condemnation of U.S. action came three days after President Barack Obama offered to send 300 military advisers to help the Iraqi government. Khamenei may want to block any U.S. choice of a new prime minister after grumbling in Washington about Shi'ite premier Nuri al-Maliki.