Sydney siege: Tighter controls likely to result, says PM

Australia's security hotline received 18 calls about self-styled cleric Man Haron Monis just days before his deadly attack on a Sydney cafe, but none suggested an imminent attack, a report says.

Two hostages were killed along with Monis during the December siege.

Prime Minister Tony Abbott is due to make a national security address on Monday, and is expected to say he would consider changes to the legal and immigration systems in response to the siege.

Phil Mercer reports.