Tesco has not yet revealed what is in the pumps, but it is suspected that either water or the wrong fuel is the root of the problem.
A spokesman said: “We’re aware of a small number of customers who have broken down at our Barnstaple petrol filling station on Sunday afternoon after purchasing fuel.
“We have temporarily closed the site as a precautionary measure so that we can fully investigate the issue. We apologise for any inconvenience caused.”
Read more: http://www.plymouthherald.co.uk/news/plymouth-news/tesco-closes-petrol-station-after-942655