Bomb disposal squad officers are continuing an investigation into an explosion in a home near Grafton.

A teenager remains in a serious condition in hospital after losing one hand and badly injuring the other in an explosion in his Grafton home on Friday.

Police say it seems the 16-year-old was making fireworks from sparklers when something went wrong.

Specialist rescue and bomb disposal squad officers have examined the teenager's bedroom.

They are still waiting to speak with the boy to find out what caused the explosion.