A bomb squad was called to a St Albans street next to a major secondary school yesterday.
Herts Police say they were called at 1.48pm on Wednesday to Central Drive, one road over from Beaumont School.
They were called after a suspicious device was found among rubble during building work.
The property and a neighbouring property were evacuated and an explosive ordnance disposal team from the Ministry of Defence came to take the device away.
It has been said the explosive was a World War Two-era bomb.
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