A bomb which closed a busy shopping area in Northern Ireland last week was targeting a person, police said.
Detectives are investigating whether the device found in Lisburn on July 30th had fallen from a vehicle.
Reports have suggested it may have been aimed at a member of the security forces.
PSNI Det Chief Insp Alison Rowland said: "Extensive enquiries are ongoing and as yet we have been unable to identify how this device was in Market Place - but we believe the target was an individual rather than a location."
A controlled explosion was carried out on the object and it was removed for examination during a security alert which lasted several hours and forced the evacuation of businesses.
A vehicle was later seized in the Lagmore area of west Belfast.
Police appealed for the drivers of four cars in the area, a grey BMW X3 or X5, blue Ford Focus, grey Vauxhall Astra or silver Suzuki SUV to contact them.
Press Association