An ongoing armed incident in Cardiff is thought to be related to the killing
A police hunt is on after one man died, another was injured, and two more taken to hospital in a suspected robbery and fire at a driver recruitment agency.
Gwent Police called in a helicopter and dogs in the search for a suspect after Driverline 247's offices were set alight and hostages reportedly taken.
Three men remain in hospital after the incident at New Inn, Pontypool.
Armed police were called later to a Cardiff street, but would not say if it was linked to the earlier incident.
Officers are searching the area around South Pontypool Industrial Park and Torfaen Business Centre following the alert at about 1325 BST.
I think [people are] very shocked that something like this could happen
Alastair Cunnington, local councillor
There were initial reports that the death was at a driving school, but that was later corrected to the driver agency.
By the evening, armed police were at an address about 20 miles away in Penrhos Crescent, Rumney, Cardiff.
There is thought to be a link, but police would not give any more details. They said local residents had nothing to fear.
In a statement on the New Inn incident, Gwent Police said: "Gwent Police attended the location and found one person fatally injured, one seriously injured and two others with injuries.
"The three injured have since been taken to the Royal Gwent Hospital for treatment.
"Gwent Police are dealing with the situation and enquiries are being made to locate the offender who made off from the scene."
A hospital spokesman said all three injured men were in a stable condition in its A&E department. New Inn is a village on the outskirts of Pontypool and about eight miles from Newport.
Ben Cunnington, 20, who works at a nearby media company, said: "We heard a helicopter going overhead and we came outside and it was mayhem with emergency services everywhere."
His father Alastair Cunnington, 51, who is also a Torfaen councillor, said: "I think [people are] very shocked that something like this could happen in the community of Torfaen, particularly the small village of New Inn."
New Panteg Rugby Football Club is also on the New Road estate, and its chairman, Maurice Morgan, said there had been a lot of police activity in the area.
"We're in close proximity and there's been police cars, police with dogs and we've had the police helicopter overhead," he said.
"They've been searching the area and some have been cordoned off."
Driverline's website says the company began trading in November 2000, "and unlike other agencies, we do not close, and therefore can be contacted 24 hours a day, seven days a week, 365 days a year".
The website says it supplies "all types of drivers" and clients include companies "ranging from home delivery, waste recycling, dairies, bakeries, frozen food distribution, parts for motor car manufacture and building materials".
It adds: "Driverline 247 will not compromise on quality, this ensures total peace and mind for our clients, as their reputation is largely dependent on the people working for them, so taking chances cannot be an option, so therefore all our temps are fully vetted to ensure they meet our exacting standards.
"Due to such rigorous checks, approximately 60% of people interviewed fail to meet the expected standards."
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