A number of people were held hostage after accidentally stumbling into a marijuana grow-op.

Ontario Provincial Police are on the hunt for a group of camouflaged suspects in Minden Hills.

The incident happened late Friday night when six people discovered the illegal operation. They also ran into the suspects who were not only dressed in camouflage but armed.

The suspects allegedly held the group for three hours. One of them managed to escape and call police.

Police seized about $3 million worth of cannabis, stocked in 18 large bags.