People who lived and worked around Southwark Street had been allowed to re-enter their homes and businesses this morning in the wake of Saturday night's atrocities.

But they were told to evacuate the buildings, with many on Twitter claiming they had been told not to return tomorrow.

Jules Mattsson tweeted: "People inside outer cordon at London Bridge, who live or work there etc, currently being evacuated (calmly), told no idea when can go back.

(Image: TWITTER/PAUL STREETS)

"Police officer described it as being 'on lockdown now', was open to those who could prove work/residence between outer and inner cordon."

Another witness, Paul McNamara said: "Office workers who were allowed inside #londonattack cordon this morning are now being evacuated. Police are not saying why at present."

A Met Police spokeswoman confirmed to Daily Star Online the employees were "inadvertently" allowed back into the offices this morning before officers had finished searching them.

She added: "The individuals in the building were asked to leave so that these searches could be undertaken. Those affected fully cooperated without incident and were advised they will be allowed to return as soon as is practicable.

"We would like to thank members of the public again for their patience and understanding while we complete the necessary processes."

"Police officer described it as being 'on lockdown now', was open to those who could prove work/residence between outer and inner cordon."

Another witness, Paul McNamara said: "Office workers who were allowed inside #londonattack cordon this morning are now being evacuated. Police are not saying why at present."

A Met Police spokeswoman confirmed to Daily Star Online the employees were "inadvertently" allowed back into the offices this morning before officers had finished searching them.

She added: "The individuals in the building were asked to leave so that these searches could be undertaken. Those affected fully cooperated without incident and were advised they will be allowed to return as soon as is practicable.

"We would like to thank members of the public again for their patience and understanding while we complete the necessary processes."

It comes as police revealed the identity of the third man involved in the attack – 22-year-old Moroccan-Italian Youssef Zaghba.

And the final Whatsapp message of fellow sicko Khuram Butt has been revealed.

Police are continuing to investigate whether Zaghba, Butt and third terrorist Rachid Redouane had links with any other terror cells.

Every one of the 12 people arrested in east London in the wake of the murderous rampage has been released without charge.

More details of the heroic actions of those caught up in the attack have also emerged, as one fearless footie fan was stabbed eight times while fighting terrorists and shouted "F*** you, I’m Millwall".