A road has been partially blocked after eight people chained themselves to the gates outside Cuadrilla, say police.
Anti-fracking protesters launched their 'lock-on' early this morning on A583 Preston New Road.
Traffic is reported to be heavy on the eastbound carriageway between Moss House Lane and Westby Road.
Martin Bishop, Force Incident Manager for Lancashire Police said: "Anti-fracking protesters are at the Cuadrilla site on Preston New Road. We have received reports that four pairs of people are chained to the gates. We are asking drivers to approach the area with care."