Dozens of students at an El Paso high school might have to re-take the SAT after their exam results flew out of a UPS truck.

NBC affiliate KTSM-TV reports the El Paso Independent School District said the test sheets were lost in transit after they were “securely submitted to UPS.” The district has recovered all but 55 SAT sheets.

“El Paso ISD is working closely with the College Board to determine a remedy for the El Paso High School students whose SAT exams were lost in transit after they were securely submitted to UPS. The incident affects students who took the exam on Oct. 27 on campus,” EPISD spokeswoman Liza Rodriguez said in a statement.

According to the College Board, which is responsible for administering standardized tests like the SAT and PSAT, they’ve experienced incidents in which tests are lost in transit.

“When such instances occur, we work with the school to ensure that students are able to retest as soon as possible,” the organization told the news station. “We are currently working with El Paso High School to provide options for the impacted students.

Meanwhile, UPS has apologized for the inconvenience, as a spokesperson for the company told NBC News that employees are still trying to locate as many misplaced tests as possible.

“We will work with the school to resolve the situation,” UPS said. “The driver’s actions in this case are not representative of UPS protocols and methods, and we are addressing this with him. Safely meeting our service commitments is UPS’s first priority.”