An Indigenous group is calling on supporters of Wet'suwet'en hereditary chiefs to remain respectful and peaceful.

The Manitoba Keewatinowi Okimakanak (MKO) says peaceful protests can bring fair and just treatment to the disadvantaged and minority groups and improve democracy.

MKO Grand Chief Garrison Settee made the statement as police investigate graffiti at the headquarters of the Manitoba RCMP, the Canadian Museum For Human Rights and MP Dan Vandal's office.

Sette says "MKO does not promote this type of activity and calls on the general public and supporters of the Wet'suwet'en hereditary chiefs to remain respectful and maintain a peaceful approach in all aspects of the issue.

"One of our inherent principles and goals as a nation is to maintain a diplomatic approach. We must lead the way and educate each other through the sharing of factual and credible information, especially during critical times such as these."

Yesterday an anti-pipeline demonstration shut down Winnipeg's busiest downtown intersection -- Portage Avenue and Main Street -- during the afternoon rush hour.