Detectives carried out stop checks in the street where a pregnant woman had her face slashed in a bid to track down the attacker on Thursday (December 19).
Hayley Baker, 29, was attacked as she walked home along Hertford Street, Cambridge, at 8.30pm on Thursday, December 12.
A team of officers stopped vehicles and pedestrians between 7.30pm and 9pm on Thursday (December 19) in the street where the attack happened, asking people to think back seven days.
Detective Inspector Jamie Stenton said: “We stopped a number of vehicles and spoke to many residents in the area.
“It was a very useful exercise and we are continuing to follow up several lines of enquiry.
“We have a dedicated team working on the investigation and will continue to put extra patrols in the area.
“We would urge anyone with any information about this shocking crime to call police.”
Anyone with any information should call DI Stenton on 101 or Crimestoppers, anonymously, on 08000 555111.
For all the latest news see Boxing Day’s (Thursday, December 26) Echo.