Councils, funeral directors and Mosques in Manchester have refused to bury Abedi's body.
British PM Theresa May said the threat level in the country will remain at critical and that 1,000 army troops have been deployed to boost security.
The Manchester bomber had been a "Subject of Interest" for MI5 - meaning someone they were investigating -- between January and July 2014, and then again in October 2015.
Two men were arrested last week following a joint operation by MI5, the UK's counter-terrorism security service, and police.
From a daily average of 28, the number shot up to 56 by the middle of this week, Greater Manchester Police said.
Baktash Noori stood by a sign which declared 'I'm a Muslim and I trust you. Do you trust me enough for a hug?'
Friday's explosion on the London tube is the latest in a string of terror attacks in the United Kingdom in recent years. Here is a timeline of the terror that has unfolded in the UK.
The man, identified as 'Abz' is believed to have been the ringleader of the trio that carried out the horror attack
The two "terrorist incidents" at London Bridge and Borough Market on Saturday night are among several attacks that have taken place in the United Kingdom in recent years.
The terror threat level has been raised to its highest level of "critical", meaning further attacks may be imminent.
The new arrests came as the injured toll doubled from 59 to 119.
Are we creating videos that can flick on the jihadi switch, asks Vaihayasi Pande Daniel.
Who were they? What led them to mass murder?
'A series of arrests have illustrated that IS now has a footprint in India.' 'India has been, for a very long time, a key part of Al Qaeda's global jihadist ambitions.'
Terrorism struck at the heart of London after a vehicle veered off the road and mowed down pedestrians on London Bridge and witnesses described men with large knives stabbing passersby at nearby Borough Market.
Eyewitnesses reported hearing a loud "bang" from inside the venue.