A taxi business has been cordoned off at Watford Junction station after two missing people were found at the premises.
Police received reports raising concerns for a missing man and woman yesterday, who were later located at the building.
Two men and a woman have been arrested and are in police custody in connection to the incident.
A spokesman from Hertfordshire Constabulary said: “Police and scenes of crime officers have cordoned off a premises close to Watford Junction Train Station in Watford following reports of concerns for welfare of two people at the premises yesterday evening.
“The two people are now safe but police are appealing for information from the public who may have seen anything suspicious in or around the station between 6pm and 9pm.
"We are particularly keen to speak to anyone who may have noticed men in a dark coloured Vauxhall acting suspiciously to contact them on 101 quoting ISR 708 of May 14. ”