The raid targeted forces loyal to former President Ali Abdullah Saleh, who are fighting alongside the Houthis.
Schools and medical facilities have been targeted, forcing people to take shelter underground.
He said the targeting force was "in position" and "having an effect and operating".
The Pentagon quietly sent a "specialized expeditionary targeting force" that has been conducting ground operations against Isis in Iraq and Syria for months.
Pentagon press secretary Peter Cook wouldn't confirm the capture, but said the goals of the new expeditionary targeting force include capturing Islamic State leaders.
In early December, Defense Secretary Ashton Carter informed Congress of a "specialized expeditionary targeting force" that will "conduct raids, free hostages, gather intelligence, and capture leaders" of isis in Iraq.
However, Turkey's offensive has so far focused mostly on targeting forces allied to the Kurdish-backed Syrian Democratic Forces (SDF), a coalition that includes YPG, an Observatory source said.
CAIRO, May 19 (Reuters) - Saudi-led air raids hit the Yemen capital Sanaa overnight, targeting forces loyal to former President Ali Abdullah Saleh in the east and south of the city, residents said on Tuesday.
Turkish forces have targeted Isis forces in Syria.
Red, blue, and green lines represent target force, the measured force, and estimated force, respectively.
