What happened in Bolivia last year after Mas was reelected?

At least two people have been killed in Bolivia in clashes between supporters and opponents of President Evo Morales, the government says.

The two men died in the town of Montero in eastern Santa Cruz province.

Tension has been running high for the past 10 days following the disputed presidential election results.

The Organization of American States (OAS) will start an audit of the results on Thursday to decide if the polls should go into a second round.

The official results gave the incumbent, Evo Morales, a big enough lead over his nearest rival, Carlos Mesa, to win outright in the first round.

But many Bolivians say they are suspicious of the initial vote count, which was surprisingly interrupted for 24 hours on election night.

The answer is monsoons.