Clarence Correctional Centre New Grafton Jail
Clarence Correctional Centre New Grafton Jail Tim Jarrett

UPDATE: Police confirm ongoing operation at new jail site

UPDATE, 2PM: NSW Police have confirmed the construction site at the new Grafton jail is the scene of police operation.

Work on Clarence Correctional Centre was brought to a halt yesterday afternoon following a bomb threat found written on a wall in a toilet at the site.

Today, a NSW Police spokesperson said there was an ongoing operation underway on the Avenue Road in Lavadia, near Grafton.

"There is no risk to public safety. More information will be provided as it becomes available," the spokesperson said.

EARLIER: A BOMB threat has brought work at the new Grafton jail site to a halt this afternoon says project director Mike Cramb.

Mr Cramb said a message had been found written on a wall in a toilet on the site, prompting the shutdown.

He said police and other emergency services were called as a precaution.

"We take these sorts of things seriously, so we shut down the site while police and health and safety people investigate," he said.

Mr Cramb said he was not sure what the message said, but it was enough to trigger the response.

"We're investigating now, it only happened mid-afternoon," he said. "We will make an announcement when we have a better idea of the situation."

The site has been evacuated and there are reports Australian Federal Police have been called in.