A baby girl has been pulled alive from a collapsed building in Nairobi, after being buried for almost four days.

According to the Red Cross, the 18-month-old had been buried for around 80 hours and was found in a bucket and wrapped in a blanket. She appeared dehydrated, "but had no visible physical injuries," the charity said.

The unnamed girl appeared "no more than one and a half years old" and was rescued at 4am local time.

The girl was taken to Kenyatta National Hospital where she is receiving medical attention.

Search and rescue operations are continuing after Friday's collapse, in which 21 people were killed.