Updated

A San Diego cable company employee expecting a shipment of fiberglass equipment got a shock when he discovered two newborn kittens clinging to life inside the box.

KGTV reports Thursday that the kittens are recovering after being accidentally shipped by truck from the Los Angeles area to a Cox Communications office in San Diego.

Upon finding the tiny black cats, a Cox warehouse worker called his nephew, who happens to work for the Humane Society in San Diego.

The kittens were so young they still had their umbilical cords attached.

Humane Society nurse Jenny Bonomini says it's likely the mother put her newborn babies in a safe spot -- a cardboard box.

Bonomini says the kittens, named Mouse and Wifi, are happy and putting on weight.