OKLAHOMA CITY – Jessica Alba ... a vandal?

Photos have surfaced that appear to show her defacing Oklahoma City property with posters of a great white shark, and police are investigating.

"I got involved in something I should have had no part of," Alba said. "I realize that I should have used better judgment, and I regret not thinking things through before I made a spontaneous and ill-advised decision to let myself get involved with the people behind this campaign. I sincerely apologize to the citizens of Oklahoma City and to the United Way for my involvement in this incident."

Photos that apparently show Alba gluing posters and posing before the defaced billboard were posted to the site of blogger White Mike, but later removed. According to the site, the posters are designed to raise awareness of the dwindling population of great white sharks.

Under Oklahoma law, maliciously defacing property can be a felony punishable by prison time if the value of the damage exceeds $1,000 or more.