Dozens of ultra-Orthodox protesters demonstrated in Jerusalem Thursday at an archaeological site that, they said, was disturbing ancient Jewish graves.

Some of the demonstrators set alight a garbage bin and threw rocks at a train on the Jerusalem light railway track as it passed the scene of the disturbance along the capital’s Route 1.

Police arrived to disperse the crowd, but did not make any arrests.

Jewish law views disturbing graves as a desecration of the dead.