Two men have been stabbed at a busy London Underground station within 24 hours of each other as the British Transport Police officers ramp up their presence at the tourist hotspot.
Officers were called to the first incident at 3.40am on Saturday and to the second just after 1.30am on Sunday at Oxford Circus station.
A spokesman from the force said the assaults are connected and have released a CCTV image of a man they want to question as part of their investigation.
A 23-year-old man was injured on Saturday and a 43-year-old man suffered stab injuries on Sunday.
Officers want to speak to this man as part of their investigation
|PA
Both men are being treated in hospital
"There is absolutely no place for violence on the rail network, and detectives are working at pace to investigate these two connected incidents," Detective Chief Inspector Gareth Davies said.
"Passengers will see an increased police presence at the station while officers carry out their inquiries.
"We are urging anyone who was in the area at the time and may have seen these incidents take place or events leading up to, to get in touch and assist us with our enquiries.
"Any piece of information might be vital for our investigation."
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The incidents took place at Oxford Circus tube station (file pic)
| PAOfficers confirmed no arrests have been made.
Any witnesses are asked to text the Met on 61016 or call 0800 40 50 40, quoting reference 49 of August 31.
They can also contact Crimestoppers anonymously on 0800 555 111.