Police opened fire on demonstrators trying to storm Kenya's legislature on Tuesday, with several protesters killed, dozens wounded and sections of the parliament building set ablaze as lawmakers inside passed legislation to raise taxes.

In chaotic scenes, protesters overwhelmed police and chased them away in an attempt to storm the parliament compound. Flames could be seen coming from inside, Reuters reported. 

Police opened fire after tear gas and water cannon failed to disperse the crowds.

A Reuters journalist counted the bodies of at least five protesters outside parliament. A paramedic, Vivian Achista, said at least 10 had been shot dead.

Another paramedic, Richard Ngumo, said more than 50 people had been wounded by gunfire. He was lifting two injured protesters into an ambulance outside parliament.

Police eventually managed to drive the protesters from the building amid clouds of tear gas and the sound of gunfire. The lawmakers were evacuated through underground tunnels, local media reported.