Signs posted on City Hall balconies telling residents to keep off the terraces in entirety or risk losing housing were “erroneous,” a University official said Thursday.

The signs told students that if they even opened their balconies, they could lose housing. Later, a second sign countered the first poster, saying residents may access their balconies as long as they do not throw any objects off the building.

“As soon as the mistake was realized, the correct information was posted,” a statement from the University said. University spokeswoman Michelle Sherrard declined to comment as to which department or official made the decision to post the inaccurate signs.

After a series of incidents over the past year where students tossed beer and alcohol bottles off their balconies – sometimes landing in neighbors’ yards, the streets and nearby rooftops – the University installed three surveillance cameras to monitor the building and warned students they could lose their housing if they are caught committing vandalism.