[Omah]

http://www.bbc.co.uk/news/uk-england-london-18042528

The Ministry of Defence has confirmed a device which can be used as a "sonic weapon" will be deployed in London during the Olympics.

The American-made Long Range Acoustic Device (LRAD) can be used to send verbal warnings over a long distance or emit a beam of pain-inducing tones.

The equipment was spotted fixed to a landing craft on the Thames at Westminster this week.

Royal Marines operating in patrol craft from HMS Ocean are also heavily armed with conventional firearms.

The piercing beam of sound emitted by the device is highly directional. Some versions of the LRAD are capable of producing deafening sound levels of 150 decibels at one metre.

But the device, which was used this week during Exercise Olympic Guardian, can also be used to broadcast verbal warnings, such as ordering crowds to disperse.

The San Diego-based LRAD Corporation has previously sold the device to the US Army, which deployed them in Iraq for crowd control.

It has been successfully used aboard ships to repel Somali pirates.

Sign at Euston Station this week :

You are now entering

Combat Zone : London

This is a

Martial Law

area