Philadelphia-based Comcast, the cable television provider responsible for the over 30-second porn interruption during Super Bowl, apologized Monday to Tucson-area customers, saying the company was 'mortified' by the interruption.

Jennifer Khoury, Comcast's Vice President, Corporate Communications says an initial investigation suggests an isolated malicious act, that has only affected Tucson area customers receiving standard definition feed, not high definition. Meanwhile, the company is conducting a thorough investigation to determine how it happened.

While, Comcast has some 80,000 customers scattered around Pima County , Marana and Oro Valley , Kelle Maslyn, the company's spokeperson declined to reveal the numbers of standard definition customers, or how many of such customers were watching the game.

Gary Nielsen, President & General Manager says investigations show the signal left the station, uninterrupted containing no inappropriate material. However, Comcast is offering a $10 credit to Tucson , Ariz. , subscribers 'impacted' by the 30-second porn clip that interrupted NBC's local affiliate's Super Bowl XLIII broadcast Sunday, which saw Tucson media outlets receiving calls from irate viewers about the pornographic material.

The 30-second clip from Playboy Enterprises owned Shorteez, a hard-core pay-per-view adult channel showed full-frontal male nudity, appearing in KVOA-TV's standard-definition feed on Comcast's local system, just when the game was in its' fourth quarter, immediately after Arizona Cardinals' Larry Fitzgerald scored on a long touchdown reception, to take a 23-20 lead, less than three minutes before the game ended.

David Fiske, Federal Communications Commission (FCC) spokesman in Washington no complaints had been filed with the commission, as of Monday afternoon. At this point, till the facts are known, FCC cannot say whether it will impose a fine or take disciplinary action.

All Comcast Tucson , Ariz. , subscribers seeking credit are directed to call (888) 315-8219.