Sebastian Gorka, Deputy Assistant to U.S. President Donald Trump and Senior Director for Counterterrorism at the U.S. National Security Council, has claimed that American troops killed 199 jihadists during a single counterterrorism operation in Nigeria.

Gorka made the disclosure during an interview with Marissa Streit, chief executive officer of PragerU, which aired on June 24.

Speaking on U.S. counterterrorism operations, Gorka said the mission represented one of the most significant successes against militants in recent years.

"I watched our operatives kill 199 jihadists in one operation," Gorka said.

He added that he observed the mission live from the White House Situation Room.

He described it as "the biggest neutralisation of enemy killed in action since September 11," saying the militants would no longer pose a threat to Americans.

The U.S. official did not identify the specific operation he was referring to.

However, the remarks appeared to correspond with either the joint U.S.-Nigeria operation on May 15 that killed Abu-Bilal al-Minuki, the deputy leader of ISIS in the Lake Chad Basin, or the May 30 operation in which Nigerian authorities reported that 21 Islamic State West Africa Province fighters were killed.

President Bola Tinubu had earlier announced that several ISIS commanders were eliminated alongside al-Minuki during the May 15 operation.

Gorka also claimed that the operation yielded an unprecedented cache of intelligence materials, saying the volume of electronic equipment recovered—including mobile phones and laptop computers—was so large that an additional aircraft was required to transport it.

According to him, the intelligence haul was three times larger than any electronic evidence recovered from terrorist groups since the September 11 attacks.

He said analysts are examining the materials to better understand ISIS communications, recruitment, financing and operational networks.

Explaining why counterterrorism efforts have increasingly focused on Africa, Gorka argued that the continent's growing Christian population has become a target for jihadist groups.

He added that ISIS has exploited weak governance and existing conflicts across the Sahel to expand its influence and promote extremist ideology.

He said the United States remains committed to working with African partners on counterterrorism operations aimed at eliminating threats to regional and international security.

While Gorka's comments describe a major operation, neither the U.S. nor Nigerian governments have publicly released official details confirming an operation in Nigeria in which 199 militants were killed.