"People talk about the refugees in Jordan or Lebanon, but most refugees are inside the city, " said Touma.

CNN: Photographer holds festival of hope amid Aleppo fighting

Egyptian forces chased the attackers to el-Touma, home of the Qurn, a clan with links to extreme Islamists.

ECONOMIST: Egypt, Israel and Sinai

No U.N. staff members were injured in the blast, said Juliette Touma, spokeswoman for the U.N. mission in Syria.

WSJ: Syria Sends Shocks Through Lebanon, Mideast

"People were really happy at the opening, " said Touma.

CNN: Photographer holds festival of hope amid Aleppo fighting

Touma said that many of his traditional audience had fled Syria, and instead many of the people coming to the festival had never been to a gallery or been interested in photography before.

CNN: Photographer holds festival of hope amid Aleppo fighting