Heavily-armed police with shields are taking part in the operation, and nearby roads have been shut down.'An active police incident is underway and the roads in the vicinity of Anzac Parade and Parkes Way are currently closed.Please avoid the area until further notice,' said ACT Police.
Beach pebbles and river pebbles are used for a variety of purposes, both outdoors and indoors.
They can be sorted by color and size, and they can also be polished to improve the texture and color.
A rock made predominantly of pebbles is termed a conglomerate.
Pebble tools are among the earliest known man-made artifacts, dating from the Palaeolithic period of human history.
Beach and river pebbles are also used to create water-smart gardens in areas where water is scarce.