WWW- Facebook said Friday it has disabled pornographic ads that were placed on profiles created by users of the popular social-networking site this week.

“Facebook strictly prohibits pornography and adult content as part of its advertising guidelines, and it reviews ads running on the site to ensure they meet those guidelines,” Matt Hicks, a company spokesman, said in a statement. “In this case, Facebook immediately disabled three ads after a review revealed that they were displaying prohibited images.”

It is not clear how many profiles ended up displaying the ads, which included a photograph of a voluptuous naked woman offering an online chat. Hicks said none of the ads was up for more than a few hours and no more than 10,000 users had the potential of seeing the ads.

Dozens of Facebook users posted comments about the ads on popular blogs asking whether the ads were random or were targeted to specific people.

Hicks said the ads were not part of a recently launched advertising program known as Beacon but instead were submitted through Facebook’s self-service Web site, which uses a combination of technology and human review to catch inappropriate ads. “In this case the image made it through tech filters and the human review caught it,” he said.