Polish police say they are looking for suspects who broke the law by placing the world-famous Solidarity emblem over the equally famous gate of the Gdansk Shipyard, where the movement was born in 1980.

In a rare irony of history, Malgorzata Michalewska, a police official in Gdansk, on the Baltic Sea, said Tuesday that the culprits should be fined.

Unnoticed, someone placed the red-letter Solidarity emblem above the gate early Sunday. It now covers up the name of Soviet leader Vladimir Lenin, whose name the shipyard had in 1980 when Solidarity was born there out of a worker protest against communist authorities. Lenin's name was taken down after Poland became a democracy in 1989.

But to the anger of many, city authorities restored it recently as a historic monument.