U.N. Secretary-General Ban Ki-moon condemned the escalation of violence in Syria, saying reports of government warplanes bombing a Palestinian refugee camp are of "grave concern."
Images from Syria
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A Free Syrian Army fighter carries the body of his colleague Abdullah during his funeral in Aleppo, Syria, December 21.2012.
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A boy holds pita bread as others stand in line outside a bakery in Aleppo, Syria, December 21, 2012.
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A damaged tank is seen at the Free Syrian Army controlled infantry college near Aleppo, Syria, December 21, 2012.
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Syrian refugees,who fled their home in Idlib due to a government airstrike, load their belongings into a vehicle after crossing into Cilvegozu, Turkey, December 20, 2012.