Lithuanian Prime Minister Mindaugas Sinkevičius on Tuesday rejected allegations of plagiarism in his doctoral dissertation, saying he wrote the thesis independently and remained confident in the academic process that led to his degree.

“I am completely calm. I defended it publicly, I wrote it myself, and no one raised any issues with me 11 years ago,” Sinkevičius told reporters at the government headquarters.

“I believe that even if some minor inaccuracies have been identified now, we can all make mistakes, but they should not be fundamental,” he added.

Questions about Sinkevičius’ dissertation have circulated on social media in recent weeks, with the latest allegations claiming that passages from other authors’ works were presented without proper attribution.

Sinkevičius suggested the scrutiny was linked to his recent appointment as prime minister.