Bulldozers have been demolishing the popular Southend mall in the Kenyan capital Nairobi's middle-class neighbourhood of Langata.

The government's National Environment Management Authority (Nema) says the building was built on riparian land, and was therefore unsafe.

Nema intends to demolish more than 4,000 buildings in Nairobi over the next two months.

This comes a day after the demolition of a Shell petrol station in Kileleshwa, Nairobi.

Lawyers for the mall's owners had opposed the demolition, but Nema pressed ahead with it, local media report.

Kenyans have been reacting to the demolishing on Twitter.