AUSTIN (KXAN) — Hudson Bend Middle School was placed on a hold Wednesday after someone called in a bomb threat, according to Lake Travis ISD. A district spokesperson told KXAN they believe the threat was a hoax, but the case is still under investigation. The call came in around 11 a.m. and students and staff were on hold for about an hour before the all-clear was given. The district told KXAN first responders and emergency crews arrived on the scene to check the school. There have been no arrests made at this time. RELATED | Wave of violent threats hit Texas schools A district spokesperson told KXAN this is the third school threat they have had in the last four school days. This is also the second school threat at Hudson Bend Middle in one week. The other took place on Monday, Sept. 16. The other threat took place on Sept. 13 at Rough Hollow Elementary School. If you have any information about these threats, contact local law enforcement or Lake Travis ISD. Lake Travis ISD is not the only school seeing an uptick in school threats, other districts in Central Texas are seeing arrests and more threats as well.