After hearing of “multiple” rumors that an active shooter would attack Tooele High School on Monday, Tooele County School District issued a statement on Facebook on Sunday night saying the threat “could not be substantiated.”

According to the statement, Tooele police officers found that the rumor of a possible school shooting originated from a Snapchat message, which told students to “sluff,” or skip, school Monday. After the message had been shared and commented on multiple times, “eventually the message changed from students should skip school into there will be an active shooter at the school,” district officials said in the statement.

There is also a rumor circulating that Tooele High School will cancel classes on Monday, but the school district says this is not true. According to the statement, classes will be held as usual Monday, albeit with additional law enforcement at both Tooele High School and neighboring Blue Peak High School.