Detectives are appealing for information and witnesses following two motorbike-enabled robberies where a £10,000 ring and a £200 watch were stolen.
The first robbery occurred at around 19:35hrs on Saturday, 19 June.
The victim, a 27-year-old woman, was walking along Moscow Road, Westminster when she was followed a short distance by two males on a motorbike.
One of the males got off the motorbike and followed the woman along St Petersburg Place before attacking her and grabbing her around the neck.
He demanded that she give him her engagement ring and pulled it from her finger. He then got back on the motorbike and both males made off towards Bayswater Road.
A second robbery took place 25 minutes later at around 20:00hrs on Melbury Road, Kensington and Chelsea.
Two males on a motorbike approached a 45-year-old woman. One of the males got off the bike and grabbed the woman from behind and stole her £200 watch.
He then got back on the motorbike and both males made off north on Melbury Road towards Holland Park.
Officers have released an image of two males who they would like to speak to in connection to both of these incidents, as well as images of the stolen ring.
The male who stole the victims’ ring and watch was wearing black clothing and a black crash helmet.
The driver of the motorbike is described as being a black male. He was wearing a black crash helmet, a white t-shirt with blue jeans and green trainers.
The stolen engagement ring is described as a three stone ‘Blue Nile’ diamond, platinum ring.
The stolen watch has a square silver and white face with a black strap and white stitching.
Detective Constable Dan Jones, from the Met’s Westminster Serious Crime Unit, said: “These men targeted and attacked two women in an attempt to snatch their belongings, which both had sentimental value.
“The attack has left these two women extremely shaken. If you saw anything or know who these two males are, please get in touch.”
If you can identify the suspects or offer any information to assist the investigation, please contact police on 101 or tweet @MetCC.
Alternatively, to give information anonymously call Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.