Powder find at mail centre

AN unidentified powder found in a Melbourne mail sorting centre is undergoing testing, days after asbestos-filled packages were sent to embassies and consulates across Australia.

Fire crews were called to the Nathan Road centre at Dandenong South just before 11pm on Sunday after a yellow powder leaked from a package, a CFA spokesman said.

Ten people were checked over by paramedics and the substance has been sent to industrial chemists for testing.

The incident was officially declared safe about 1.40am.

Australia Post says operations have returned to normal.