Lebanese gunmen are on guard during clashes between the rival neighborhoods of Alawite Jabal Mohsen backing Syrian President Bashar al-Assad, and Sunni Bab al-Tabbaneh, the opponents of the Syrian administration in Tripoli, Lebanon, on May 23, 2013. At least seven people were killed and 40 others injured in overnight clashes in Lebanon's northern city of Tripoli, bringing the total casualties of the four-day clashes to over 20 killed and 160 injured, according to security source. (Xinhua/Omar)
A resident walks pass cars destroyed during clashes between the rival neighborhoods of Alawite Jabal Mohsen backing Syrian President Bashar al-Assad, and Sunni Bab al-Tabbaneh, the opponents of the Syrian administration, in Tripoli, Lebanon, on May 23, 2013. At least seven people were killed and 40 others injured in overnight clashes in Lebanon's northern city of Tripoli, bringing the total casualties of the four-day clashes to over 20 killed and 160 injured, according to security source. (Xinhua/Omar)
A Lebanese gunman is on guard during clashes between the rival neighborhoods of Alawite Jabal Mohsen backing Syrian President Bashar al-Assad, and Sunni Bab al-Tabbaneh, the opponents of the Syrian administration in Tripoli, Lebanon, on May 23, 2013. At least seven people were killed and 40 others injured in overnight clashes in Lebanon's northern city of Tripoli, bringing the total casualties of the four-day clashes to over 20 killed and 160 injured, according to security source. (Xinhua/Omar)
A motor vehicle destroyed during clashes between the rival neighborhoods of Alawite Jabal Mohsen backing Syrian President Bashar al-Assad, and Sunni Bab al-Tabbaneh, the opponents of the Syrian administration, is seen in Tripoli, Lebanon, on May 23, 2013. At least seven people were killed and 40 others injured in overnight clashes in Lebanon's northern city of Tripoli, bringing the total casualties of the four-day clashes to over 20 killed and 160 injured, according to security source. (Xinhua/Omar)