Its new hostage video calls on Japan, whose prime minister is touring the Middle East, to ends its 'foolish' support of the US-led campaign against Islamic State, and marks the first time the group has demanded cash in a video.
Israel did not confirm the strikes, reportedly near the Damascus airport and Lebanon's border, but analysts noted Prime Minister Netanyahu spoke earlier of dealing with regional threats.
Unnamed officials say authorities detained family members of the Islamic State's Abu Bakr al-Baghdadi at the Syrian-Lebanese border.
Gill Rosenberg, a foreigner fighting with Kurdish forces in Syria, was allegedly captured by the Islamic State. Various Kurdish sources report Ms. Rosenberg is safe, but military officials have not provided evidence of life.
French President François Hollande said that Europe needs to be more vigilant about the radicalization of its citizenry after the appearance of several Europeans in the video showing the execution of American aid worker Abdul-Rahman Kassig.
Kurdish fighters continue to gain ground against the self-described Islamic State in the Syrian border town of Kobane. Meanwhile, Iraqi forces have reportedly regained full control of the country's largest oil refinery.