The woman who died after being knocked down by a bus at the Lisburn bus depot has been named as 48-year-old Linda Stewart Rooney.
Ms Rooney was from the Lisburn area.
The incident happened at the Lisburn depot on Monday morning, closing the centre for several hours while accident investigators examined the scene.
Jo-anna McLucas was at the bus depot at the time of the collision.
She said: “I was waiting for the bus home and all I heard was the bang of the bus hitting the wall and I tried to see what had happened.
“The bus had hit the wall and I walked outside and there was a small gap between the wall and the bus and I could see there was someone on the ground.”
She said she did not know if the woman, who was being tended to by several members of staff from the depot, was dead or alive at that time.
Speaking to UTV, she said: “I am still in a bit of shock myself. That happened a few feet away from me. That’s usually where I stand to get the bus so if I was standing there I would have been hit.”
On Monday afternoon, a Translink spokeswoman said: “We can confirm that a fatal incident occurred in Lisburn bus centre today, around 10.15am.
“Emergency services attended the scene. A full investigation is under way.”
Ciaran Rogan from Translink told the BBC: “Our thoughts and our sympathies are with the family and relations and friends of the young lady involved. It really is a tragedy.”
Mr Rogan said the bus driver was “distressed” and would be given support by the transport company.
“We would have assistance available within Translink [for those] who are involved in accidents because it can affect people very badly at times.
“We’ll give the driver every assistance as we will any member of staff who was badly affected.”
A PSNI inspector said: “I would appeal to anyone who witnessed the incident to contact the Collision Investigation Unit at Steeple on 101.”