However, one engineer also developed code for collecting Wi-Fi network payload data that he "thought might prove useful for other Google services," the FCC report said.

The letter by Pallone and Barrow suggests Google may have "misled" Congress and federal investigators about the Wi-Fi snooping.

"We are concerned that the facts uncovered by the FCC's investigation put Google's initial explanation of these events in question," they wrote.

While Google has called the snooping a mistake, the FCC report said Google's actions "resulted from a deliberate software-design decision of a Google employee who examined and evaluated the data that was collected and shared his findings with others at the company," the lawmakers wrote.

The IDG News Service