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A top leader in the militant Islamic cell known as the the "Khorasan Group" was killed last week by U.S. Coalition forces in Syria, the Pentagon announced Sunday.

Sanafi al-Nasr was killed Thursday during a drone strike in the country's northwest, officials said.

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The Khorasan group, which is composed of battle-tested al Qaeda fighters who relocated to Syria, has been described as posing a threat to the U.S. that is equal to that of ISIS.

Nasr was a Saudi national "experienced in funneling money and fighters" from "the Gulf region to Iraq and then to al-Qaeda leaders from Pakistan to Syria," said Pentagon spokesman Peter Cook.

He added that Nasr also "organized and maintained" travel routes for recruits from Pakistan to Syria.

A user on a top Al-Qaida web forum has announced the deaths of 3 top Jabhat al-Nusra figures in an "American Crusader" air strike in Idlib. — Evan Kohlmann (@IntelTweet) October 16, 2015

Nasr, who moved from Iran to Syria in 2013, according to the statement, was identified as the highest ranking leader in the Khorasan Group and its fifth "senior" leader to be killed in the last four months.

The slain men were from the so-called "Khorasan Group", a unit of Jabhat al-Nusra fighters comprised of senior Al-Qaida veterans from AFPAK. — Evan Kohlmann (@IntelTweet) October 16, 2015

Another militant described as a Khorasan leader, Muhsin al-Fadhli, was killed during an airstrike in July.

Muhsin al-Fadhli is seen in an undated photo provided by the U.S. State Department in Washington, D.C. A long-time al Qaeda operative and key figure in the Khorasan Group, Muhsin al-Fadhli, was killed in a U.S. air strike while traveling in a vehicle near Sarmada, Syria, on July 8, the Pentagon said in a statement on July 21, 2015. U.S. State Department via Reuters

"This operation deals a significant blow to the Khorasan Group's plans to attack the United States and our allies, and once again proves that those who seek to do us harm are not beyond our reach," Secretary of Defense Ash Carter said in the statement.