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ISIS'  alleged  fighter  jet fleet  dwindling?

DAMASCUS -- If the Islamic State of Iraq and Syria (ISIS) was learning to fly stolen Syrian fighter jets, it may have seen its fleet of three reduced to just one "ineffectual" aircraft.

CBS News' George Baghdadi reports Information Minister Omran Zoubi said late Tuesday that Syrian military aircraft had shot down two of three fighter jets allegedly stolen by ISIS as it rampaged across northern Syria seizing army and air bases in the Aleppo region.

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ISIS reportedly flying warplanes over Syria

The Syrian Observatory for Human Rights (SOHR), a U.K.-based organization which relies on an extensive network of sources and activists inside Syria, said on Friday that defected Iraqi military officers were teaching members of the terror group how to fly three commandeered jets at the al-Jarah air base in rural Aleppo.

Asked about the SOHR report, the U.S. military said it was unaware of ISIS (also known as ISIL) flying fighter jets "in Syria or elsewhere."

"We continue to keep a close eye on ISIL activity in Syria and Iraq and will continue to conduct strikes against their equipment, facilities, fighters and centers of gravity, wherever they may be," U.S. Central Command spokesman Colonel Patrick Ryder told the Reuters news agency.