FLINT, MI -- Schools in Genesee County will be closed Thursday and Friday after threats of violence allegedly tied to the end of the Mayan calendar

.

The Genesee Intermediate School District offered this statement:

A phone message sent to parents and staff in the Flushing school district noted that administrators, secretaries, custodians and maintenance workers are still expected to report to work on Thursday.

Genesee Intermediate School District spokesman Jerry Johnson said it isn't clear if students will be forced to make the days up at the end of the year.

Johnson added the decision to cancel classes was a unanimous decision by Genesee County's school superintendents.

Schools across the area are taking precautions against rumors that some students plan to bring weapons to school Friday in conjunction with the end of the Mayan calender, Johnson

.

Clio school officials had announced that doors of all buildings in the district were to be locked for the remainder of the week, including front doors to schools and individual classrooms. Clio Superintendent James Tenbusch said in a Dec. 17 letter to parents that the actions come in response to last week's school shooting in Newtown, Conn.

Law enforcement also were forced to respond to Grand Blanc High School after a 911 call came in

at the high school shortly after 11 a.m. Wednesday.

The text message that created a 911 call came from the parent of a student at the high school's east campus. Police soon found out that there was a similar text message that went out at the same time from a student in the west campus. Police tracked down that student and said the student also told officers it was a text. Police have not determined if the texts were a coordinated effort by the pair.

Lapeer, Almont, North Branch and Dryden schools in neighboring Lapeer County also sent out letters Wednesday night

for the rest of the week.

Dryden superintendent Tom Goulette wrote: