Lebanese army soldiers and residents gather at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley
Lebanese army soldiers and residents gather at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley March 17, 2014. At least three people were killed when a suicide car bomber struck a Hezbollah stronghold in Lebanon's Bekaa Valley on Sunday in an apparent response to the fall of a rebel-held town to government forces across the border in Syria. A security source said two of the dead from the blast in Nabi Osmane were members of the Lebanese Shi'ite Muslim militant group Hezbollah whose fighters backed the Syrian army earlier in the day in their takeover of Yabroud. REUTERS/Hassan Abdallah (LEBANON - Tags: POLITICS CIVIL UNREST MILITARY)
A man walks past damaged cars at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley
A man walks past damaged cars at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley March 17, 2014. At least three people were killed when a suicide car bomber struck a Hezbollah stronghold in Lebanon's Bekaa Valley on Sunday in an apparent response to the fall of a rebel-held town to government forces across the border in Syria. A security source said two of the dead from the blast in Nabi Osmane were members of the Lebanese Shi'ite Muslim militant group Hezbollah whose fighters backed the Syrian army earlier in the day in their takeover of Yabroud. REUTERS/Hassan Abdallah (LEBANON - Tags: POLITICS CIVIL UNREST)
Lebanese Red Cross personnel and Lebanese army soldiers inspect the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley
Lebanese Red Cross personnel and Lebanese army soldiers inspect the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley March 17, 2014. At least three people were killed when a suicide car bomber struck a Hezbollah stronghold in Lebanon's Bekaa Valley on Sunday in an apparent response to the fall of a rebel-held town to government forces across the border in Syria. A security source said two of the dead from the blast in Nabi Osmane were members of the Lebanese Shi'ite Muslim militant group Hezbollah whose fighters backed the Syrian army earlier in the day in their takeover of Yabroud. REUTERS/Hassan Abdallah (LEBANON - Tags: POLITICS CIVIL UNREST MILITARY HEALTH)
People gather at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley
People gather at the site of Sunday's explosion in Nabi Osmane in the Bekaa Valley March 17, 2014. At least three people were killed when a suicide car bomber struck a Hezbollah stronghold in Lebanon's Bekaa Valley on Sunday in an apparent response to the fall of a rebel-held town to government forces across the border in Syria. A security source said two of the dead from the blast in Nabi Osmane were members of the Lebanese Shi'ite Muslim militant group Hezbollah whose fighters backed the Syrian army earlier in the day in their takeover of Yabroud. REUTERS/Hassan Abdallah (LEBANON - Tags: POLITICS CIVIL UNREST)
Syrian forces retake Yabroud
Syrian forces patrol the town of Yabroud after driving out rebel fighters with help from Hezbollah militants.
A boy poses for a photograph as he is seen through a hole in a wall in Al-Maliha town, in the suburbs of Damascus
A boy poses for a photograph as he is seen through a hole in a wall in Al-Maliha town, in the suburbs of Damascus March 16, 2014. Picture taken March 16, 2014. REUTERS/Bassam Khabieh (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
Men ride on bicycles past damaged buildings in Al-Maliha town, in the suburbs of Damascus
Men ride on bicycles past damaged buildings in Al-Maliha town, in the suburbs of Damascus March 16, 2014. Picture taken March 16, 2014. REUTERS/Bassam Khabieh (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
A man walks past a crater that activists said was caused by a bomb dropped by a Syrian Air Force fighter jet loyal to President Assad in Al-Maliha town
A man walks past a crater that activists said was caused by a bomb dropped by a Syrian Air Force fighter jet loyal to President Bashar al-Assad in Al-Maliha town, in the suburbs of Damascus March 16, 2014. Picture taken March 16, 2014. REUTERS/Bassam Khabieh (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)
A view of a damaged street filled with debris in Al-Maliha town, in the suburbs of Damascus
A view of a damaged street filled with debris in Al-Maliha town, in the suburbs of Damascus March 16, 2014. Picture taken March 16, 2014. REUTERS/Bassam Khabieh (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT)