Police have not closed the file regarding the man alleged to have delivered the threatening letter to the Australian High Commissioner James Batley last year.

Police spokesman Atunaisa Sokomuri said the file is still open and the CID are still investigating the matter.

He said CID officers have some leads from the description of the taxi driver who went with the man to deliver the letter.

Sokomuri said police officers are still guarding the vicinity of the Australian Embassy.