An investigation has been launched after two men allegedly robbed a man of his phone on the London Underground before assaulting two officers.
British Transport Police have released CCTV images of a pair wanted for questioning in relation to the incident.
The force said two men allegedly attempted to rob the victim's phone after he alighted a Central Line train at Oxford Circus Underground station.
The incident occurred at around 3.15pm on Sunday, March 8.
Two officers intervened but were assaulted as the suspects fled the scene.
Detectives would like to speak to those pictured, as they believe they may have information which could help their investigation.
Anyone who recognises them is asked to contact British Transport Police by texting 61016 or by calling 0800 40 50 40, quoting reference 331 of 8 March.
Information can be given anonymously to Crimestoppers on 0800 555 111.
British Transport Police said two men allegedly attempted to rob the victim's phone after he alighted a Central Line train at Oxford Circus Underground station
Detectives would like to speak to those pictured, as they believe they may have information which could help their investigation