Medical students at a London university have to re-sit an exam paper because of complaints over questions appearing on a mobile phone app.
About 420 fourth-year medical students at Kings College London are to re-sit a paper they took on Tuesday.
It follows claims that a lecturer who wrote some or all of the paper had based many of the questions on information published on a phone app the person had designed.
The university is investigating.
It has confirmed that students will re-take the paper in 10 days' time.
One who contacted the BBC News website said the author of the paper had an app on iTunes which "a few students" had been told about.
"Over 60% of the final paper was lifted from this app," the student said.
"Instead of conducting a full investigation, Kings College London is making the whole year, 400 students, re-sit their exam only a few days after their practical exams, causing a lot of stress."
The university said it did launch an immediate investigation and was keeping students fully informed and offering them support.
"We are taking this matter extremely seriously and launched an investigation as soon as we were made aware of the issue," a spokeswoman said.