Police in Sydney are on high alert for possible revenge attacks following the execution of a senior gangland figure in Vietnam, according to multiple reports. The alerts focus on concerns that violence could spill over internationally and escalate within Australian criminal networks linked to overseas groups. Police say they are monitoring the situation closely and preparing for potential retaliation, which they describe as a likely response in gang conflicts. The reports do not specify further details about the victim’s identity beyond describing the person as a senior gangland figure, nor do they provide information on the circumstances of the execution. Both outlets present the development as an overseas incident that prompts Australian law enforcement to increase readiness. The coverage characterizes the response as preventive, with police aiming to identify and deter any threats related to the execution and to respond quickly should incidents occur. Authorities continue to assess intelligence and risks as the situation develops.