Officials are speaking out about a video that appears to show a rallier jumping on the Tomb of the Unknown Soldier.

General Wayne Eyre -- chief of the defence staff -- says he's “sickened” to see people behave that way.

A video posted on Twitter by Steven Thornton, director general at the Department of National Defence, shows people pumping their arms and chanting “Freedom” at the National War Memorial, including one person apparently standing atop the tomb.

Defence Minister Anita Anand says the memorial is sacred, and the ralliers' behaviour is “beyond reprehensible.”