Three more men have been arrested in connection with the Manchester terror attack as Britain remains on critical alert amid fears suicide bomber Salman Abedi did not act alone.
As armed soldiers prepare to guard "key locations" across London, the Ministry of Defence announced that the Changing the Guard ceremony at Buckingham Palace has been cancelled today to redeploy police officers.
Greater Manchester Police revealed on Wednesday morning that three men have been arrested in the south of the city in connection with the concert bomb attack. It follows the arrest yesterday of a 23-year-old man, who remains in custody.
It comes after Scotland Yard confirmed that troops are being deployed to sites including Buckingham Palace, Downing Street, the Palace of Westminster and embassies.
The military will replace armed police at many locations under Operation Temperer, which is being enacted after security experts warned the Government that another terrorist attack could be imminent.
The authorities are seeking to establish if Abedi, the Manchester suicide bomber who left 22 people dead, was part of a wider network.
Amber Rudd, the Home Secretary, said on Wednesday that it is "likely" he was not acting alone as she confirmed up to 3,800 troops can be deployed across the UK.
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Britian's Theresa May has alerted military units to support armed police after meeting in the COBRA emergency room earlier on Tuesday with senior military leaders.
Particularly, UK law enforcement and armed forces will move forward on the assumption that the threat level is "critical," according to May's orders.
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