A local has described how after the Rhoose area was "really silent and quiet" after the crash.
"We're normally it's very busy along here," she said. "All the mums were standing still. I asked what happened and they said the lollipop lady and some children had been knocked over."
One of the parents outside Rhws Primary School this morning told ITV News: "You just feel lucky it wasn't you."
Martin Rauch said the Rhoose collision occurred on the same route his family walks to the school.
"We go down that side of the road," he said.
"We cross at that crossing, with that lollipop lady. It could easily have been us."
He added that the community was in 'a state of shock'.
Five adults and four children have been taken to hospital with injuries.
First Minister of Wales Carwyn Jones said: "I am very concerned to hear about this morning's incident in Rhoose and I am being kept fully informed of developments.
"Clearly, our thoughts are with those involved."
Police said a traffic incident in which five children and four adults were injured outside a primary school in Rhoose, South Wales, was not believed to be deliberate.
"At this stage the collision is not believed to be a deliberate act," South Wales Police said in a statement.
Police said the 61-year-old male driver of the Audi car involved in the incident was assisting police with their enquiries.
The driver was one of the nine people injured in the incident.
Police say nine people have been taken to hospital following this morning's collision in Rhoose - four with 'significant injuries'.
Officers are asking anyone who witnessed the collision, or who gave assistance, to contact the South Wales Police Serious Collision Investigation Unit using the 101 number.
Police added the school, which is open, is currently contacting pupils' parents.
The Vale of Glamorgan Council is offering support to both school and pupils.
A Wales Air Ambulance spokesperson says it treated three patients at the scene of the Rhoose collision but no one was flown to hospital.
A statement said: