(Adds arrests) CHTOURA, Lebanon, June 7 (Reuters) - Lebanese security forces found a car bomb in eastern Lebanon on Thursday and two other vehicles containing weapons and explosives, including four Katyusha rockets, security sources said on Thursday. They said two suspects were arrested a few hours later at the same village, Bar Elias, just west of the border with Syria in the Bekaa Valley. On Wednesday, three suspected al Qaeda members were arrested there in possession of weapons and explosives. Security forces conducted Thursday's raids after the men gave details of the cars and accomplices. The three were found to be in possession of forged travel and identity documents, computers, maps of Lebanese cities and night vision equipment. Security forces also found explosives in suitcases and guns, the sources said. The nationalities of those arrested were not immediately available. The potential for Sunni Muslim militancy is on the rise in Lebanon as an al Qaeda-inspired militant group, Fatah al-Islam, battles the Lebanese army at a Palestinian refugee camp in northern Lebanon. The group has threatened to expand its fight to other areas of Lebanon and beyond if the army does not halt a 19-day-old attack. At least 115 people have been killed in the fighting.