British officials said Monday that they would re-open an investigation into Wi-Fi data collected by Google's Street View cars after the search engine giant admitted last week that it captured entire e-mails, URLs, and passwords.

"We will be making enquires to see whether this information relates to the data inadvertently captured in the U.K., before deciding on the necessary course of action, including a consideration of the need to use our enforcement powers," the Information Commissioner's Office (ICO) said in a statement.

Google on Friday said that it collected entire e-mails, URLs, and passwords when its Street View cars accidentally sniffed unencrypted Wi-Fi networks. The company first admitted the misstep in May, but had not yet determined whether personally identifiable information was included among the data.

Data protection officials from several countries, including the U.K., were invited by Google to review the data collected by the company in their countries. In July, the ICO said it was satisfied that the U.K. data did not include any meaningful personal data about residents in the region.

"On the basis of the samples we saw we are satisfied so far that it is unlikely that Google will have captured significant amounts of personal data," the ICO said at the time. "There is also no evidence as yet that the data captured by Google has caused or could cause any individual detriment."

In light of Google's Friday admission, however, the ICO said that it will keep an eye on the investigation and what might emerge.

"Whilst the information we saw at the time did not include meaningful personal details that could be linked to an identifiable person, we have continued to liaise with, and await the findings of, the investigations carried out by our international counterparts," ICO said.

Last Tuesday, before Google's admission, Canada's privacy commissioner said that Google's Wi-Fi sniffing was a serious violation of Canadians' privacy rights and included the collection of personally identifiable information. She asked Google to put in place several privacy safeguards by Feb. 1.

Google made several changes to its privacy policies on Friday: it appointed Alma Whitten to serve as Google's director of privacy across privacy and engineering; it promised to enhance its core privacy training for engineers and other groups; and Google said it will add a new process to its existing review system.