The 437 youths who were detained after overnight clashes with police in Copenhagen have been released, but will all be charged later, AP quoted police spokesman Flemming Steen Munch as saying Sunday. Munch said he did not know all the specific charges yet, but said some demonstrators could face jail sentences. Rock-throwing youths clashed with police Saturday after officers prevented a crowd of several thousand people from reaching a vacant waterworks, which they have sought to use as a place for parties and concerts. The youths wanted the waterworks to replace the so-called Youth House, a popular hangout for anarchists, punk rockers and left-wing groups, which was torn down in March. The City of Copenhagen sold the Youth House to a Christian congregation six years ago, and evicted the anarchists in March in order to hand the building over to its new owners, who subsequently tore it down. The youths have claimed the city had no right to sell the building and have staged several demonstrations demanding a new house.