BRUSSELS: A plane carrying EU chief Ursula von der Leyen was hit by GPS jamming as it readied to land in Bulgaria on Sunday, Brussels said Monday, alleging Russia was thought to be behind the incident. The European Commission said Bulgarian authorities suspected the disruption “was due to blatant interference” from Moscow but it was not clear if the chartered flight was deliberately targeted. “We can indeed confirm that there was GPS jamming,” Commission spokeswoman Arianna Podesta told a press conference in Brussels.