BEIRUT, July 31 (Xinhua) -- A Lebanese warplane struck the Islamic State group (IS) posts in the outskirts of Ras Baalbeck Monday, which resulted in injuries of the militants, the local LBCI TV reported. The strikes come following reports that the Lebanese Army has reinforced areas around the northeastern towns of Ras Baalbeck and Al-Qaa near IS held Lebanese territory, warning that they would launch an offensive to push the terrorist group out of the country. Hezbollah launched last week an offensive against Jabhat Fatah al-Sham (formerly known as al-Nusra Front) that ended with a cease-fire agreement Thursday. The agreement consists also on the evacuation of al-Nusra's militants and their families from the outskirts of the Lebanese border town of Arsal to north Syria, and the return of eight Hezbollah fighters held by al-Nusra, five from northern Syria and three from the outskirts of Lebanon's Arsal.