HALIFAX -- Nova Scotia's Justice Department has confirmed there is a connection between the delivery of suspicious packages to five courthouses in the province and similar deliveries in Manitoba in April.

Spokesman Andrew Preeper says packages arrived today at courthouses in Bridgewater, Kentville, Truro and Halifax.

On Monday, four employees of a courthouse in Amherst were released from hospital after complaining of nausea, dizziness and burning to the throat after a suspicious package was delivered there.

There are no reports of illnesses in the latest incidents and all tests for dangerous chemicals were negative.

The department says the packages came from Asia and the remainder of the province's justice centres have been put on alert.

Similar packages were received April 8 at provincial court buildings in Winnipeg, Brandon, Morden and Minnedosa -- all of which tested negative for dangerous substances.