The fence was no more than nine feet high, clearly designed to stop casual intruders, while the real defenses were not in view.

Why do Pelham's and other top-rated school systems work so hard at stopping intruders?

The guards, alert to stop intruders, did not move as she went out the glass doors of the building, down the rain-wet steps.

Soldiers have strung concertina wire at entrances to stop intruders.

If the shields failed to stop intruders from crossing this secluded courtyard, the vines would snare them.

Sometimes laser fences are used in fiction with the ability to stop intruders by blocking or injuring them.

Officials said barbed wire would ring the police academy to stop intruders, and security forces would surround the facility's outer fence.

As to how the dolphins would stop intruders, Navy officials will say only that the tasks will not intentionally jeopardize the animals' lives.

The simplest innate system is the cell wall or barrier on the outside to stop intruders getting in.

The fences, which are intended to stop intruders, buttress concrete barriers already erected to thwart Palestinian sniper attacks.