An Islamist fighter has told Reuters by telephone that the US airstrikes would have "no impact" on militant activities.
"The planes attack positions they think are strategic, but this is not how we operate. We are trained for guerrilla street war," he said.
"God is with us and our promise is heaven. When we are promised heaven, do you think death will stop us?"
The US airstrikes prompted renewed calls on jihadi online forums for attacks on the United States and oil interests in the Gulf.
"The mujahideen must strive ... to discipline America and its criminal soldiers," the SITE monitoring service quoted one such message, on the Shumukh al-Islam jihadi forum, as saying.
Kurdish Peshmerga fighters have emerged victorious in the battle for Mosul Dam, but the question is - what will their next move be?
An ITV News team at Mosul Dam was with victorious Kurdish Peshmerga fighters at the complex earlier today.
ITV News joined a Kurdish unit fighting Islamist militants near Irbil and found them using tanks from the 1950s and short on ammunition.