KUALA LUMPUR - A scuffle ensued at the Dataran Merdeka area after an individual apparently threw firecrackers at Bersih 4 protesters here, injuring four.
A protester who witnessed the incident said that the man, dressed in a black T-shirt and yellow headband, threw it at some protesters resting at a car park.
He said the man tried to throw another but was foiled by other protesters.
"He was identified and immediately cornered by protesters," he said.
He added that the police arrived to calm the situation, and the man was given some medical attention.
"The medical team treated him and he was arrested and brought away," he said.
The four injured protesters were also given immediate medical attention.
A medical officer, Yap, said the injuries were not so severe.
"There were some bad burns but nothing more," she said.
However, after the Negaraku was sung, another explosion was heard, but things remained under control.
The crowd dispersed as the organisers urged to go back home after the rally ended.