Greece's Golden Dawn leader Nikolaos Mihaloliakos held

Greek police have arrested the leader of the far-right Golden Dawn party, Nikolaos Mihaloliakos, on charges of forming a criminal organisation.

Another Golden Dawn MP has been held and more warrants issued, police said.

The arrests and warrants come amid anger over the murder of anti-racist musician, Pavlos Fyssas, who was fatally stabbed on 18 September.

The BBC's Mark Lowen in Greece described Saturday's events as "an unprecedented clampdown on the neo-Nazi party".