A US Army sergeant has been charged with supplying top secret intelligence and military equipment to twisted terror group ISIS.

Ikaika Erik Kang, 34, who served in Iraq and Afghanistan, was detained on Saturday after allegedly attempting to provide material to the death cult including a drone aircraft and combat training instructions.

4 US soldier Ikaika Erik Kang has been arrested and charged with supplying material to ISIS

4 Clifford Kang said his son became interested in Islam while stationed in the Middle East Credit: AP:Associated Press

The air traffic control specialist, who also had extensive military training in hand-to-hand combat, was arrested by the FBI on Saturday following a year-long undercover probe.

An FBI affidavit filed in court detailed a lengthy sting operation employing several undercover agents and other "confidential human sources" who posed as ISIS operatives and sympathisers.

As described in the affidavit, the sting drew to a climax as Kang allegedly swore a pledge of loyalty to ISIS leader Abu Bakr al-Baghdadi, then allegedly proceeded to make training videos for the extremist group.

He was taken into custody that same day, the affidavit said.

Hours earlier, according to the FBI, he had purchased a GoPro drone aircraft and camera kit that he intended to be sent to the Middle East to help ISIS fighters evade enemy tanks in battle.

Kang is also accused of attempting to furnish ISIS with classified and other sensitive military records that would have assisted the group in its combat tactics.

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But the FBI said none of those documents made it to the depraved terror group.

His father Clifford Kang told the Honolulu Star-Advertiser that his son became interested in Islam while stationed in the Middle East a couple of years ago.

But while speaking with the news outlet, the horrified dad said he was shocked to learn of his son’s alleged involvement with the murdering terror cult.

He said: “Nobody told me anything. This is the first time I heard about' it. I'm kind of stunned to tell you the truth.”

He added: “I never heard of him being with ISIS.”

Kang Jr, who was reportedly a highly decorated officer, was expected to appear in court yesterday following his arrest on Saturday.

The suspect allegedly told an undercover FBI agent that he wanted to kill “a bunch of people”, reports the Mail Online.

4 Kang allegedly pledged allegiance to ISIS leader Abu Bakr al-Baghdadi the day he was arrested Credit: AP:Associated Press

4 The highly decorated US soldier was serving at Schofield Barracks in Honolulu at the time of his arrest Credit: Google Earth

Kang, a member of the 25th Combat Aviation Brigade, 25th Infantry Division, was assigned to the Army's Schofield Barracks, a major garrison on the island of Oahu.

He is believed to be a "lone actor" with no ties to anyone who might pose a threat to Hawaii, the FBI said.

He was brought to the FBI's attention by the Army last year, officials said.

At a brief court appearance on Monday, he was presented with the charges against him and ordered to remain in federal custody pending a July 13 detention hearing. He entered no plea.

Kang's attorney, Birney Bervar, told reporters afterwards that he knew "very little" about the case, having spoken only briefly to his client just before the hearing as he was handed a copy of the complaint.

Kang, who attained the rank of sergeant first class, served three overseas tours of duty - one each in South Korea, from 2002 to 2003, Iraq from 2010 to 2011 and Afghanistan from 2013 to 2014.

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