A Syrian jet flew 20km into Lebanon and fired a missile at the outskirts of the border town of Arsal on Wednesday, April 3 but caused no casualties, witnesses said, according to Reuters.

Forces loyal to President Bashar al-Assad have fired mortars into and occasionally entered Lebanese territory in pursuit of rebels groups. They threatened air strikes in Lebanon last month. When a Syrian jet bombed Lebanese territory in mid-March, Lebanese President Michel Suleiman called it an "unacceptable violation" of Lebanese sovereignty.