UPDATE. Police confirm that the siege is over.Four people are understood to be injured, including one police officer.
UPDATE II. To no great surprise, the now-dead terrorist turns out to have been quite a piece of work:
Self-described cleric, Man Maron Monis, 50, first came to attention of police when he penned poisonous letters to the family of dead Australian soldiers.
Last year he was charged with being an accessory to the murder of his ex-wife and mother of two.