UN Syria envoy arrives in Damascus

This photo provided by the Syrian Civil Defense White Helmets, which has been authenticated based on its contents and other AP reporting, shows Civil Defense workers using a drill to dig through rubble in search for victims in Aleppo, Syria, Saturday, Nov. 19, 2016. Government bombardment of besieged rebel-held neighborhoods in the northern city of Aleppo killed at least 20 people Saturday Syrian opposition activists said, a day after the health directorate said all hospital in opposition areas have been knocked out of service. (Syrian Civil Defense White Helmets via AP) (The Associated Press)

This photo provided by the Syrian Civil Defense White Helmets, which has been authenticated based on its contents and other AP reporting, shows Civil Defense workers and Syrian citizens carry a dead body in the neighborhood of Seif al-Dawleh in Aleppo, Syria, Saturday, Nov. 19, 2016. Government bombardment of besieged rebel-held neighborhoods in the northern city of Aleppo killed at least 20 people Saturday Syrian opposition activists said, a day after the health directorate said all hospital in opposition areas have been knocked out of service. (Syrian Civil Defense White Helmets via AP) سيف الدولة (The Associated Press)

This photo provided by the Syrian Civil Defense White Helmets, which has been authenticated based on its contents and other AP reporting, shows Syrian citizens inspect damage buildings after airstrikes hit the Seif al-Dawleh neighborhood in Aleppo, Syria, Saturday, Nov. 19, 2016. Government bombardment of besieged rebel-held neighborhoods in the northern city of Aleppo killed at least 20 people Saturday Syrian opposition activists said, a day after the health directorate said all hospital in opposition areas have been knocked out of service. (Syrian Civil Defense White Helmets via AP) (The Associated Press)

The U.N.'s special envoy to Syria has arrived in Damascus to meet with Foreign Minister Walid al-Moallem amid an intensified government campaign in Aleppo that has left all hospitals in the city's opposition-held districts out of service.

U.N. Envoy Staffan De Mistura and al-Moallem are expected to hold a press conference Sunday afternoon.

De Mistura warned in an interview with the U.K. newspaper The Guardian earlier this week that the government was chasing a "phyrric victory" in Aleppo if the government does not arrive at a political settlement with the opposition

He warned the that military's unrestrained approach would drive more moderate rebels into the ranks of the Islamic State group.

The pro-government Al-Watan newspaper reported Damascus's displeasure with De Mistura's comments ahead of Sunday's meeting.