The demonstration of about 2,000 people according to the organizers, many of them ready for violence, was widely peaceful although noisy.
According to eye-witnesses, some 800 protesters later threw bottles and stones at the police.
A heavy police presence gave the march a dangerous atmosphere, with onlookers being heard chanting for the police to go away.
Several people have been detained after the police halted the demonstration in a bid to stop people throwing bottles.
S/SH 11