WINNIPEG - RCMP say they are investigating suspicious envelopes found at five courthouses in Manitoba.

Officers were first called Wednesday to the court building in Thompson, where two people experienced breathing problems.

Mounties say the two people were treated at the scene and did not need to go to hospital.

Packages were also received throughout the day at courthouses in Winnipeg, Brandon, Morden and Minnedosa.

RCMP Assistant Commissioner Kevin Brosseau says the large envelopes contained documents.

He says tests are being done, but it's believed the public is not at risk.