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.