Nchimbi announced his resignation earlier this week after reportedly falling out with President Samia.

At least 270 people have died in the massive flash floods, while more than 800 others are missing.

The 89-year-old has been in hospital for over a week receiving treatment for a rare blood condition.

Preliminary investigations by scientists have pointed to a collapsed glacier as the cause, highlighting the issue of rapidly melting Himalayan ice.

Hundreds have died in flooding and landslides on the border of Nepal and Tibet.

One woman says her father, mother, sister and sister's children were carried away before her eyes.