ISIS’ second in command was killed during a raid in Syria on Thursday morning, a senior U.S. official told NBC News.

The death of the commander, a senior religious leader within ISIS who goes by various aliases, comes after officials told NBC News earlier this month that top ISIS commander Omar al-Shishani — also known by his nickname Omar the Chechen — was believed killed in a U.S. airstrike in Syria.

The deaths are major scores for U.S.-led coalition forces in taking out the biggest names on the U.S.’s terror hit list.

This is a breaking news story. Please check back for updates. This article originally appeared on NBCNews.com.