Berlin: Ivory Coast striker Salomon Kalou could be fined up to 10,000 euros (US$10,535) for using a hammer and chisel on the Berlin Wall, which is under a protection order.
The ex-Chelsea star, who now plays for Hertha Berlin, was being filmed by a Berlin TV station as part of a report on their 2-2 Bundesliga draw with Schalke on Saturday.
He mimicked breaking off a piece of the wall with the tools at the tourist attraction, the Eastside Gallery.
But what remains of the Berlin Wall, which divided Germany`s capital from 1961-89, has been under a protection order since 1991.
Anyone defacing it can be heavily fined with the authorities set to investigate whether any damage was done.
"I nearly fell off the sofa when I saw the footage," Kani Alavi, the chairman of the Eastside Gallery, told the Berliner Kurier newspaper.
"Here we have a well-paid celebrity increasing his market value at the expense of a national monument. Without respect. And with the clear backing of television.
"Just because there is no security patrolling the Gallery, doesn`t mean you can go around doing what you want.
"If he had done that at the Brandenburg Gate, the player would probably have been arrested."