Video posted on Facebook of a mouse running through the produce section of a market in Covina triggered an investigation by the Health Department on Monday. Shopper Alejandro Rivera told KTLA he spotted a mouse running across the vegetable counter and shot video of the rodent. Rivera said he alerted a security guard who called over his supervisor and they grabbed the mouse, put it in a bag and disappeared with it. Read KTLA's story here: http://on.ktla.com/Xpd18 | KTLA 5 News