Police are appealing for witnesses to come forward after a 30-year-old woman was dragged from her vehicle in Handcross Road, Luton, on Saturday morning.
The incident happened at around 6:05 am when the victim was getting into her vehicle on her way to work.
A man, who was known to the victim, dragged her from her vehicle, forcing her into his own.
The woman screamed, which alerted a neighbour, who came to her assistance.
A 32-year-old man has been arrested but police are keen to speak to anyone who may have seen the vehicle, a black Ford Galaxy, between 6.03am on the A505 Luton and 7.42am on the A1 northbound at Astwick.
It is believed it may have been using false number plates and displaying the index number of E058 VFT or FG09 POA.
If you have information relating to this incident, contact the non-emergency numer 101, or text information to 07786 200011.
Alternatively, you can contact the independent charity Crimestoppers anonymously, on 0800 555 111, or online at crimestopper-uk.org.