U.S. officials are investigating over the airdropped weapons intercepted by the ISIS fighters which were originally meant to give assistant to the Kurdish fighters on Monday.

Several social media accounts that are affiliated to the Islamic State of Iraq and Syria group uploaded videos and photos showing the weapons. Included in the list are the hand grenades, ammunition and rocket-propelled grenade launchers while the rebels post a thank you message. According to the Britain-based Syrian Observatory for Human Rights, the group of extremist was able to seize one package.

Although majority of the supplies reportedly end up in the right hands, Fox News reports that Pentagon spokesman Rear Adm. John Kirby said that they are still investigating the uploaded videos.

"We just don't know. We're still looking at it," Kirby said.

The airdrops that were reportedly intercepted by the ISIS fighters contain supplies coming from the U.S. aims to support the Kurdish fighters that are currently facing the militant group in a battle. The supplies delivered by three C-130 cargo planes arrived in the Syrian town of Kobani that lies near the Turkish border. The militants have been already trying to seize control of the town for over a month, but the military forces of America have constantly given their aid.

According to earlier reports, the airdropped supplies given by U.S. contain a package needed by the Kurdish fighters. The items reportedly intercepted by ISIS aside from weapons also includes important package such as the antibiotics, anesthetics and other sanitary supplies needed to treat wounded fighters and civilians.

The airdropped intercepted supplies are not the first belongings that the militant groups have tried to use. In the earlier reports, the group already started to learn how to fly warplanes after being able to capture a jet. Syrian government forces with the aid of other foreign countries such as that of the U.S. has been trying to take down the ISIS by launching several airstrikes in the territory controlled by the militants.