More than 20 houses were evacuated in the street as army bomb experts made the device safe and checked the area for other devices during a three-hour operation.

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The device fits into a checked bag and reports city location in real time to any mobile, Apple, Android, or SMS capable devices.

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"We treated a slice of bread in the device, we then checked the mould that was in that bread over time against a control, " he explained.

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