At least four bodies were found lying in the streets of a Nairobi slum on Sunday with the discovery sparking clashes, police sources and Kenyan media said.

The bodies of three men and a woman were found in the city's Mathare slum, one of several flashpoint areas where violence erupted during last month's disputed presidential election re-run, which was largely boycotted by the opposition.

It was not immediately clear how they had died.