MARSHALL, Texas — Marshall ISD has been placed on lock down for the second time due to another series of threats.

Marshall ISD Superintendent Dr. Jerry Gibson released a statement via Facebook Friday morning of an increase in police presence at all campuses following Thursday’s phone threats. 

RELATED: Lockdown lifted at Marshall ISD after reports of school threat

The incident caused the entire district to go on lock down Thursday afternoon and was lifted after police deemed it safe. 

As of Friday morning, investigators have received several leads, none which involve any MISD employee or their families.

“Absolutely not,” Gibson said. “We are confident that this threat did not originate from any MISD employee or any member of their family.”

Gibson says the district is prepared to prosecute anyone found in connection to the threat.

"Our number one priority, every day here in MISD, is to keep our students and employees safe," Gibson said. “We realize for some of our students that this can be an intense time, but our teachers and staff are trained to protect and serve our children, with the number one goal of assuring their safety."