Manchester suicide attacker Salman Abedi bought most of the components used to make the bomb himself, police have said.
Many of the bomber’s movements and actions were “carried out alone” in the four days prior to the attack, Russ Jackson, head of the North West counter terrorism unit, said. But police have yet to rule out whether he was part of a wider network.
Three men arrested over the attack were released without charge on Tuesday.
Det Ch Supt Jackson said much of the police investigation had been working through Abedi’s last movements. Officers have examined his movements on CCTV and other interactions he had with people as well as phone calls he made.
“Our enquiries show Abedi himself made most of the purchases of the core [bomb] components and what is becoming apparent is that many of his movements and actions have been carried out alone during the four days from him landing in the country and committing this awful attack,” said Det Chief Supt Jackson.