The Metropolitan Police has released new footage of officers entering a property in Newcastle as part of the search for Abdul Ezedi.
Ezedi is being hunted over an attack with a corrosive substance in south London on Wednesday that has left a woman with life-changing injuries.
Searches have taken place at two addresses in east London and three in Newcastle.
The force said the property had empty containers with corrosive warnings on the labels, which were recovered from the address.
Searches relating to Abdul Ezedi have taken place at two addresses in east London and three in Newcastle
PA/Met Police
Commander Jon Savell said: "Abdul Ezedi was last seen at King's Cross Underground Station at 21:00hrs on Wednesday, 31 January, where he boarded a Victoria Line train travelling southbound. The police investigation to establish his subsequent movements and ultimately locate him is continuing at pace.
"I want to thank everyone who has contacted police to share what they know. We have received dozens of calls with information, including possible sightings, and every single piece of information has been recorded and forms part of our ongoing investigation.
"I can assure the public that my colleagues and I are fully committed to using every available tool and tactic for as long as it takes to find Abdul Ezedi.
"I am today urging the public to remain vigilant and to contact police immediately if they may have seen Ezedi or have information about him. I would also like to reiterate that if you see Ezedi, you should call 999 immediately. He should NOT be approached."
One of the containers recovered from the Newcastle property
Metropolitan Police
Forensic tests are currently ongoing to see if the containers held the substance used in the attack.