Follow CBSDFW.COM: Facebook | Twitter

NORTH TEXAS (CBSDFW.COM) – More area schools are responding to concerns about creepy clown sightings in North Texas.

READ MORE: Texas Legislators Pass New Congressional Map Shoring Up GOP Power

River Oaks ISD issued a statement Tuesday about a clown threat reported Monday saying it was just a prank:

The threat against Castleberry High School that we reported yesterday has been exposed as a “prank” committed by a 16 year old student. The individual that initiated this threat has taken full responsibility and there are no other suspects involved. We would like to thank everyone for their understanding and cooperation during this event.

TCU sent out a message to students and faculty urging them NOT to dress up as clowns in the wake of reports of people around the country and North Texas dressing as clowns to prank people.

The university said the TCU Police Department and Fort Worth Police are working together to help the community address rumors of this behavior around TCU.

TCU said it is increasing the number of officers on foot patrol in response to concerns raised by students in the last 24 hours.

Crandall ISD issued a statement on the clown concerns on its Facebook page:

Mesquite ISD also posted on its Facebook page about concerns over reports and rumors about clowns:

READ MORE: Carroll ISD Parents Pack School Board Meeting Following Administrator's Secretly-Recorded Holocaust Comment

Some parents responded they were concerned about word of red balloons being found on campus.  Mesquite ISD responded that one student was in possession of a red balloon and that issue has been addressed.

Keller ISD also put this statement on its website:

In Keller ISD student safety is our top priority. We are aware of the clown reports and the posts making the rounds on social media. Keller ISD is working with local law enforcement, and they have said they strongly believe this is a hoax in a long line of potential threats to schools across the country. We have no reports of suspicious persons on school property. Regardless, we take any potential threats seriously. Both police departments and district security have stepped up patrols as a proactive precautionary measure. We have protocols in place at all campuses to ensure student safety, and all campuses are running on regular schedules. If you do encounter a clown or see a suspicious post on social media, please report it immediately to the police and campus security/administration.

Multiple area school districts have been tweeting about it as well:

DISD also put out a letter to parents Monday saying the district was aware of “clown threats” circulating on social media around the country.  The district said it “confirmed that police are calling the clown threat is a hoax and there is no perceived threat.”

Meantime, Weatherford Police said they received a “strange clown sighting” 911 call Monday about a clown on a tricycle riding down the street.  Responding officers found nothing.  

Reports of clowns began surfacing across the country in August. In Ohio, clown related threats on social media put one school on lockdown, and forced an entire school district to cancel classes for a day. Kids in South Carolina reported similar eerie sightings of clowns in the woods.

Nationwide, police are examining each threat but said many of them appear to be nothing more than hoaxes.

MORE NEWS: Police From All Over Rally To Lift Spirits Of North Texas Child Battling Cancer

(©2016 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)