2014 Sydney hostage crisis
After the siege began, a staged exclusion zone was established with thousands of people evacuated from nearby buildings, including from the floors above the café. The Sydney Opera House was evacuated after a suspicious package was found; however, reports were unconfirmed by police. The US Consulate General in Sydney, located in Martin Place, was also evacuated. Some Sydney schools were put in "white level lockout" due to the hostage situation, which meant that no school group was permitted to leave the school grounds.
Gangs in Australia
A further issue is the extent to which the gangs like the 5T are responsible for the violence and extortion that is occurring in the Sydney area. 
There are many media reports of 'Asian gangs' in Sydney engaging in violent robberies including 'home invasions',
Vietnamese syndicates have gained media attention again recently with a recent drug bust in Melbourne. Casino high roller, Thanh Hai Pham, and his wife were ring leaders of this syndicate and a total of 12 people were arrested in connection with this operation.