In today's Tech Bytes, ABC's Rhiannon Alley shares, the cyber-attack affecting grocery stores. There are some empty shelves and freezers at Whole Foods and other chain locations.

A string of recent cyberattacks and data breaches involving the systems of major retailers has started affecting shoppers.

A hack on wholesaler UNFI’s IT systems last week has created stocking issues at grocers across the country. Cub, which UNFI ...