Police publish the image of Abedi, caught on CCTV not far from Manchester Arena shortly before the explosion.
"We are gathering a detailed picture of Abedi as the investigation develops and now need people to tell us if they have any information about his movements from May 18 when he returned to the UK through to Monday night. The investigation is making good progress and we know one of the last places Abedi went was the city centre flat and from there he left to make his way to the Manchester Arena. The flat is highly relevant as a location which we believe may be the final assembly place for the device," department noted.
Police informed that 13 people were detained on suspicion of involvement in the terrorist act.
As is known, at least 22 people have been killed and over 120 injured in what is being investigated as a suspected suicide bombing of a crowded pop concert in Manchester, the most deadly attack in Britain in a decade.