Pro-government forces have cornered rebels into a tiny sliver of territory in the Syrian city of Aleppo in an intense battle that has resulted in more bloodshed for a civilian population already battered by years of war in what was once a key economic hub.

“Thousands of civilians’ lives are in danger as front lines close in around them,” said a statement from the International Committee of the Red Cross. “A deepening humanitarian catastrophe and further loss of life can be averted only if the basic rules of warfare — and of humanity — are applied.”

In recent weeks, more than 100,000 people have fled fighting in what remains of the rebel enclave, pouring into government- and Kurdish-controlled areas in recent weeks, according to the Syrian Observatory for Human Rights, a monitoring group based in Britain. Here's a look at what the evacuations looked like as the government made its final push into the opposition-held parts of the city.

People evacuate a neighborhood in Aleppo after government forces recaptured it from rebels. EPA/SANA

In this photo released by the Syrian official news agency SANA, a Syrian soldier carries a wounded woman in eastern Aleppo. (SANA via AP)

Syrian residents, fleeing violence in the restive Bustan al-Qasr neighborhood, arrive in Aleppo's Fardos neighborhood. (AFP PHOTO)

Syrian rebels withdrew from six more neighborhoods in their onetime bastion of east Aleppo in the face of advancing government troops on Tuesday, the Syrian Observatory for Human Rights said. (AFP PHOTO)

Aleppo was hit with cold and rain on Tuesday. (AFP PHOTO)

Syrian pro-regime fighters gesture as they drive past resident fleeing violence. (AFP PHOTO)

Tens of thousands of Aleppo residents have fled violence in recent weeks. (AFP PHOTO)

Syrian civilians flee the Sukkari neighborhood toward safer rebel-held areas in southeastern Aleppo on Monday. (AFP PHOTO)