Major police operation unfolding at Sydney; people inside shop seen with arms in the air

A major police operation is underway in downtown Sydney, where several people inside a shop could be seen holding their hands held in the air.

New South Wales state police would not say Monday what was happening inside the shop or whether hostages were being held. But television footage shot through the windows of the shop showed several people with their arms in the air and hands pressed against the glass.

Police officers were lined up outside the shop.