Lebanese Army soldiers have killed one al - Nusra Front militant and injured two others in Lebanon ' s eastern town of Arsal.On Wednesday, the Army opened fire at a minibus carrying a group of militants trying to infiltrate into the country from neighboring Syria, China's Xinhua news agency reported. According to the report, the incident happened when the driver refused to stop at a checkpoint in the Bekaa town of Arsal bordering war-torn Syria. The al-Nusra Front has been behind many of the deadly bombings targeting both civilians and government institutions across Syria. Syria has been gripped by deadly unrest since 2011. According to reports, the Western powers and their regional allies -- especially Qatar, Saudi Arabia, and Turkey -- are supporting the militants operating inside Syria. In a recent statement, the United Nations High Commissioner for Refugees said the number of Syrian refugees, who have fled the country’s 29-month-long conflict, has reached two millions. The UN refugee agency also said some 4.2 million people have also been displaced inside Syria since the beginning of the conflict in the Arab country.