Police in Malaysia have arrested more than 1,400 anti-government protesters after thousands of people marched on the capital Kuala Lumpur.
Officers fired repeated rounds of tear gas to break-up the crowds who had evaded city-wide roadblocks to take part in the rally.
At least a dozen people were hurt including opposition leader Anwar Ibrahim who fell over during a tear gas attack.
“We have seen extremely brutal and totally uncalled for (action),” he said. “And the Najib administration must answer our demand: free elections. They are so scared of free elections”.
As well as the call for an end to vote irregularities, demonstrators demanded the government halt economic reforms which are seen by many analysts as essential to bring in new investment.
Street protests are rare in Malaysia. However opposition voices have become louder in recent years.
Some analysts think the latest police response was excessive and could dent the Prime Minister’s image among voters. His approval ratings have climbed since he was elected.