A top Vietnamese official has been sacked for "violations" while running national oil and gas firm PetroVietnam, in a rare public censure by the ruling Communist Party. <br/><br/>The government said on that Dinh La Thang, 57, was no longer part of the top decision-making Politburo. Mr Thang's alleged misconduct was first leaked on social media last year. <br/><br/>His sacking comes amid a wider crackdown on PetroVietnam, the country's largest enterprise. <br/><br/>It is extremely uncommon for a Politburo member to lose their place in the one-party state. Since Vietnam started economic reforms in 1986, only two other Politburo members have been dismissed.<br/>