Investigators probing the deaths of about 150 Punjab Institute of Cardiology (PIC) patients arrested 13 men on Friday. Sources in Investigation Wing of the Lahore Police said around 13 men had been arrested by the investigators under various charges. They said the suspects included two PIC employees, two employees of the supplying company (Umar Trading) and nine employees of Feroze Chemicals. The sources said the men were arrested from various parts of the city during a successful raid, adding that the men were taken to an undisclosed location.