Tensions have flared at Brisbane's Victoria Park after police, Brisbane City Council officers and firefighters entered a protest camp standing in opposition to a planned $3.6 billion Olympic stadium development.Campers challenged officials over the visit, and questioned why no appointment had been made, while one protester threatened media and staff members with physical violence if they did not leave.Council officers instructed protesters to pack up their belongings and questioned them about dogs and campfires.Protesters have been given until 2pm to remove their tents from the site.After delivering the message, police and council staff withdrew while about a dozen officers remained stationed on a road within the park.Ownership of the land is due to be transferred to the Games Independent Infrastructure and Coordination Authority (GIICA) on Monday, with the Queensland state government vowing that construction work will begin immediately. The confrontation comes as opposition continues to Brisbane's planned Olympic stadium at Victoria Park, a centrepiece of preparations for the 2032 Olympic and Paralympic Games.The protest group, which says it will not leave, is awaiting a federal government decision on an application for cultural heritage protection for the inner-city park, where historic Aboriginal gathering and camping is recognised in its Queensland Heritage Register listing.The state government has sought to clear the way for the project by exempting it from a range of heritage, environmental and planning laws last year, and recently converted Victoria Park to freehold land.