The shortage is the result of the campaign against Sunni insurgency strongholds in the Anbar province, the Middle East Newsline reports. The military faced similar concerns in November 2004 after the offensive in Fallujah.

The JDAMs are used to convert bombs that range from 500 to 2,000 pounds into precision guided weapons. They are used where collateral damage is a concern or to penetrate concrete bunkers 4 to 6 feet thick.

The newest JDAM weapon in the Marine Corps arsenal is the 500-pound GBU-38, which has become the preferred precision guided munitions for fixed wing aircraft in the urban close air support environment, the report said.

Officials said it produces the smallest amount of collateral damage and can be used in all weather conditions.