Chicago ? The Wrigley Field Vandal left no fingerprints and no clues.

He left behind only the result of his crimea hideous gap in the lush ivy that adorns the outfield wall at Wrigley Field.

“We think someone leaned over from the bleachers and dumped something that killed some of our ivy,” Cubs executive vice president Mark McGuire said.

Cubs officials have no suspects. But they do suspect the person is a White Sox fan.

“I think we’re just assuming,” McGuire said. “No decent Cubs fan would damage the ivy.”

They also have a strong bit of circumstantial evidence. Head groundskeeper Roger Baird noticed preliminary evidence of the damage during the Cubs’ series against Texas, which took place June 18-20.

The Cubs were host to the Sox from June 14-16. June 17 was an off day.

“If somebody poured something on that area, it would take 48-72 hours to start taking effect,” Baird said. “Hopefully, God-willing, it comes back.”

Baird does not view the transgression as a clever prank.

“I’m pretty upset about it,” he said. “To be truthful, I’ve tried to keep it quiet. It’s a little scary. I’m worried that if one does it, one could turn into five and then we’d have major problems.”

The cavity, which measures about four feet wide, extends from the base of the wall to the home-run baskets in right-center field. The unsightly swath is visible from almost every non-outfield seat.

The Cubs are reluctant to institute new rules to prevent another incident.