On Tuesday, Ahmed Moaz al-Khatib, of the Syrian National Coalition, said assuming the Arab League seat had "restored legitimacy".

BBC: Russia anger at Syrian Arab League opposition seat

In an open letter Friday, Ahmed Moaz al-Khatib, head of the National Coalition of Syrian Revolutionary and Opposition Forces, implored the U.N.

CNN: Syrian rebel leader talks victory and squalor

Ahmed Moaz al-Khatib, head of the opposition Syrian National Coalition, met earlier this month in Munich, Germany, with U.S. Vice President Joe Biden.

CNN: Syrian official: 'We have already won'