BENGALURU: Work on five Metro pillars near Tin Factory on the Outer Ring Road line has halted for the last four days after a person, claiming to be the actual owner of a piece of land on which the pillars were coming up, ensured that waste engine oil was splashed on the structures on one pillar ruining it. Fearing destruction of nearby pillars on this stretch between Benniganahalli and KR Pura, construction work has been fully stopped.