Three activists have been charged after at two locked themselves to a loaded Aurizon coal train at Tennyson.

The train was on a freight rail line at the corner of Tennyson Memorial Avenue and Fairfield Road when protesters stopped the train by standing on the tracks.

Activists blockade an Aurizon coal train at Tennyson. Credit:Glenn Hunt

Two protesters then jumped onto the locomotive and locked themselves on at 9am.