The NEET-UG 2026 exam, held on May 3, was cancelled following allegations of a 'guess paper' leak that affected over 22 lakh students. Rajasthan police reported that a handwritten document containing approximately 410 questions was shared among students via coaching networks and WhatsApp groups. Investigators noted that around 120 questions from the guess paper matched those on the actual exam, potentially affecting nearly 600 marks of the total 720. The guess paper allegedly originated from a medical student in Churu, Rajasthan, and spread rapidly before the exam. Despite the National Testing Agency (NTA) implementing stringent security measures, including GPS tracking and AI-assisted monitoring, the exam was deemed compromised. Political reactions have been strong, with Congress leader Rahul Gandhi condemning the situation as a failure of the government, citing a history of exam leaks in India. The Central Bureau of Investigation (CBI) has now taken over the investigation into the matter.