On Thursday, British police claimed they had detained a man after a number of needles were used to inject processed meats and microwaveable items at three shops in west London.

Following the incident on Wednesday evening, the Little Waitrose, Sainsbury’s Local, and Tesco Express stores were closed.

Police were summoned after allegations that the guy had yelled obscenities at individuals and sprayed food goods into stores on Fulham Palace Road.

“It is currently unknown as to how many items have been contaminated, or what with,” the Metropolitan Police said in a statement. “Investigations are on-going to establish if other businesses in the area are involved in the incident.”