Anti-fracking protesters have blocked the main access road to a Fylde coast business park.
The lock on demonstration is being staged in Bourne Road, the main access route to the Hillhouse Business Park in Thornton.
Anti-frackers say material is being stored on the site for use at fracking firm Cuadrilla's drilling site in Preston New Road, between Blackpool and Kirkham.
Campaigners staged a protest at Hillhouse on Friday before being removed by security.
They are understood to have returned early this morning.
Lancashire Police said two protesters were 'locked-on' blocking access to the site which is home to several major chemicals firms.
Heavy goods vehicles are unable to access the business park.