Syrian rebel groups in Aleppo enter alliance
Rebel groups fighting in Syria's northern Aleppo province have agreed to form an alliance, a group monitoring the country's civil war said on Thursday.
A lack of unity among Syria's opposition groups has undermined the revolt against President Bashar al-Assad and made foreign powers wary of intervening in a conflict now in its fourth year.
Many of the strongest factions are hardline Islamists such as Islamic State and the Nusra Front, al Qaeda's affiliate in Syria, who have clashed with one another and with more secular rebel groups.
