Armed police executed two warrants in Newcastle in the early hours of Thursday morning at addresses associated with alkali attack suspect Abdul Ezedi including his place of work but no arrests have been made, the Metropolitan Police said.
The force said the raids took place as part of a joint operation with Northumbria Police.
Met detectives have been searching for Afghan refugee Ezedi since a mother and her two daughters, aged three and eight, were doused with a corrosive alkaline liquid in Clapham, south London last Wednesday night.
On Wednesday, officers said Ezedi and the 31-year-old victim, who is still too ill to speak, had been in a relationship but it broke down.
He was last seen crossing Vauxhall Bridge at 11pm on the night of attack, January 31, but there have been no confirmed sightings since. a £20,000 reward remains on offer for information leading to his arrest.
Speaking on Wednesday, Met Commander Jon Savell said: “The woman remains in a critical but stable condition in hospital. As we know she has very serious injuries and remains sedated and so poorly we haven’t yet been able to speak to her.
“This was a senseless and cruel attack by a dangerous man – we urge anyone with information about Ezedi’s whereabouts to contact us as matter of urgency. He is wanted for attempted murder.”
An earlier raid of properties in Newcastle last week, where Ezedi travelled from on the day of the attack, uncovered empty bottles with corrosive warning labels.
Officers have suggested that the 35-year-old could be being shielded by accomplices, as more than 100 officers hunt for him, or that he could be dead.
Convicted sex offender Ezedi was granted asylum after converting to Christianity sparking a fierce political debate.
He arrived in the UK on the back of a lorry in 2016.
Reports have suggested that he gained asylum after being given written testimony from a church to say that he had converted to Christianity, allowing him to stay in Britain on human rights grounds.
Home Secretary James Cleverly is understood to be awaiting a full report on the decision to grant Ezedi asylum before scrutinising whether there are flaws in the system which could prompt rule changes.
The suspect is thought to have travelled from South Clapham tube after the attack, reappearing in a Tesco Express in Caledonian Road near King’s cross where he bought a bottle of water.
The footage clearly shows he has serious injuries to the right side of his face. He then went into King’s Cross station and was picked up again on camera at Tower Hill.
He then headed towards the Thames with the last confirmed sighting when he was caught on camera crossing Vauxhall Bridge Road into Grosvenor Road at 11.03pm on Wednesday.
