Four senior Islamic State leaders have been killed due to coalition airstrikes over the past three weeks, the Pentagon declared Tuesday.

"The removal of these key terrorists disrupts ISIS' weapons engineering activities and their ability to recruit and train terrorists," said a news release from Combined Joint Task Force Operation Inherent Resolve officials. "It also reduces their ability to plan and conduct terrorist attacks, both within Syria and Iraq and abroad."

Those killed by the airstrikes include Yusuf Demir, an ISIS media official, Omer Demir, an external operations coordinator, Abu Yazin, an senior leader and a weapons facilitator, and Abdellah Hajjiaou, an external operations plotter.

"The coalition will continue to exert pressure on ISIS senior leaders and associates across multiple networks in order to degrade, disrupt, and dismantle ISIS structures and remove the extremist terrorists throughout Iraq and Syria," officials said.

The leaders were killed in Iraq and Syria between Oct. 26 and Nov. 5.

Earlier this month, two U.S. airstrikes killed several ISIS militants in Somalia.

President Trump has vowed to strike ISIS “10 times harder,” following the New York City attack where a man drove a truck into pedestrians last month. The suspect, Sayfullo Saipov, was referred to as a “soldier of the Caliphate” by ISIS.