Video: Occupy Pittsburgh 'Flash Mob' Storms Target

Facing a Sunday deadline to vacate their encampment, Occupy Pittsburgh demonstrators nevertheless stormed a local Target retail store Saturday in protest of the company's hiring practices.

Protesters in the "flash mob" chanted and marched inside the store for about 10 minutes before dispersing, the Pittsburgh Post-Gazette reported. Among their gripes was the company's policy of hiring part-time versus full-time workers, the newspaper said.

Police were on the scene but no arrests were made.

Video posted online shows a noisy crowd of protesters marching from the store's entrance up to the main level, chanting at customers and employees who were caught off guard.

"What do we want?" "Unions!" "When do we want 'em?" "Now!" protesters shouted.

Local media reports about the number of protesters that participated varied: The Post-Gazette described it as "nearly 100" while the Pittsburgh Tribune-Review pegged the number closer to 350.

According to the Tribune-Review, the march was preceded by a "human rights rally" nearby.

Occupy Pittsburgh has been ordered to vacate its park encampment by Sunday, according to the Pittsburgh Business Times. BNY Mellon, which owns the park, informed protesters Friday they must leave and said it will ask a court for an injunction if they do not.