An investigation is under way into a serious road accident in Co Laois in which a young boy and his mother were seriously injured.

The two-car collision happened on the Portlaoise road in Portarlington shortly after 8.30pm.

The woman and a young boy in one of the cars were seriously injured, while a second boy in the same car, received minor injuries.

The male driver of the second car was not seriously hurt.

The injured have been taken to Portlaoise and Tullamore hospitals and the road is closed for forensic examination.