The US-led coalition claims it has killed ten ISIS leaders in a series of specifically targeted air strikes over the last few weeks.
Coalition spokesman colonel Steve Warren claimed that the casualties include the suspected masterminds of last month's bombings in Paris, France, as well as potential perpetrators of additional attacks against the West.
Among the ISIS leaders killed, Abdul Qader Hakim is said to have assisted external militant operations and is linked with the Paris terror attacks. He was killed in the northern Iraqi city of Mosul.
Syrian ISIS member Charaffe al Mouadan had a direct link to Abdelhamid Abaaoud, the Belgian who planned the Paris terror attack, and was killed in a police raid in Paris.
Other senior ISIS figures killed in the air strikes include Mohammed Emwazi, nicknamed Jihadi John, and Abu Sayyaf, head of the militant oraganisation's oil and petroleum operations.
Syrian Bangladeshi Siful Haque Sujan was killed near Raqqah, Syria. He was responsible for ISIS's technical operations, such as hacking, anti-surveillance technology, and weapons development.
Warren added: "I think any organisation that sees its middle and upper management degraded in this way is going to lose some of their synergy.
"In addition to our tactical operations, we are also striking at the head of this snake by hunting down and killing ISIL leaders."
Supported by the US coalition, rebel forces in Syria captured Tishreen Damin in the northwestern part of the country.
The rebels seized the hydroelectric dam along the banks of the Euphrates river, which had been held by ISIS since November 2012.
Accordig to Warren, the seizure denies an important logistics route between the town of Manjib and Raqaa, the stronghold and capital of ISIS.