Yes, that was the Texas state flag flying over the highest and most iconic roofline on the University of Kansas campus on Friday.

For fans who looked uphill in the middle of KU’s home football game against the University of Texas, there it was. The opposing team’s state flag where the KU flag should have been, snapping in a brisk wind right next to the American flag atop seven-story Fraser Hall.

It’s not clear what time the Texas flag went up or how long it had been there, but according to emergency scanner traffic, someone reported it to KU police shortly before 11:40 a.m.

Right at noon, the Texas flag was down and the usual crimson and blue “K” flag was back in its place.

The KU-Texas football game started at 11 a.m. at Memorial Stadium.

The flag stunt was not planned by KU, university officials confirmed.

As to how the apparent prank was pulled off, answers weren’t immediately clear.

The state flag of Texas temporarily replaced the state flag of Kansas for a brief period over Fraser Hall on Friday, Nov. 23, 2018 at Memorial Stadium. by Nick Krug

On Friday, in the minutes before the flag came down — if not all of Thanksgiving break — all the exterior doors to Fraser Hall were locked.

Fraser Hall’s rooftop flagpoles are accessible only from inside the building, and the area to reach them is kept locked.

Inside that area, KU Facilities Services department workers access the flagpoles by climbing spiral staircases inside each of the two cupolas, standing on a grate and lowering the flags up and down through trap doors, according to a previous Journal-World feature. The flags are 8 feet by 12 feet and not that easy to corral, especially when it’s windy.

Multiple people reported the rogue flag to KU police, who also saw reference to it on social media, university spokeswoman Erinn Barcomb-Peterson said. She said police found no signs of forced entry and that they are investigating the incident as a case of criminal trespassing.