Two people were taken to hospital following a crash in Crumlin.
The accident happened at the Pen y fan Industrial Estate just before 9am yesterday, December 23.
Gwent Police said two cars collided with drivers of each injured.
A 21-year-old woman was taken to the Royal Gwent Hospital while a 29-year-old man was taken to Nevill Hall Hospital.
A spokesperson for Gwent Police said the injuries were not life-threatening, but that both drivers were in a serious condition.
Fire and rescue crews from Aberbargoed and Ebbw Vale crews attended.
The road was reopened at 12.30pm.