Emergency response teams have been deployed across several foreign consulates in Melbourne.
Foreign diplomatic offices of countries like Germany, Korea, Italy, India and Spain are among the affected and are currently being attended by the emergency response teams.
A report from the Australia Federal Police indicate that the suspicious packages are being examined and their circumstances being investigated.
Two trucks, a hazardous material vehicle and police cars attended to the India consulate as staff waited outside. The staffs were instructed not to comment to any press.
Officials from the British High Commission said that they are working closely with the federal police and local authorities.
India, USA, Swiss, British and the Germany consulates believe they were being targeted from the suspicious packages.
Greek, Pakistan and Egypt consulates are also said to be in lock down following the security threat.