Grand Rapids Public Schools made the unusual announcement of being open, on a day when some school districts closed in the very cold weather.

School system spokesman John Helmholdt told WOOD Radio News earlier this morning that somebody had hacked the District's website shortly after 6 a.m. to claim closed schools.

Now Helmholdt says that "after further investigation, it has been determined that there was a technical error."

He said one of the previous school closing messages had been flagged to reappear automatically. 

He said, "The district takes full responsibility and apologizes for the confusion."