Labour Leader Jeremy Corbyn | Eamonn M. McCormack/Getty Images Jeremy Corbyn: Labour leadership contest could be rigged Embattled leader ‘surprised at the numbers of people who’ve been denied a vote.’

U.K. Labour chief Jeremy Corbyn is investigating whether his party's leadership contest is rigged against him amidst claims that some of his supporters have been barred from voting, he told the Guardian.

"I’m surprised at the numbers of people who’ve been denied a vote and I’m surprised at the lack of reason that’s been given to people,” Corbyn told the paper in an interview published late Monday. “I’m concerned about that because surely in a democratic process everyone should be entitled to vote unless there is some very good reason against them."

Some party members have allegedly been banned from voting in the leadership election because they made abusive threats on social media, according to the Guardian.

Corbyn said he had asked for the name of every barred person, but was not worried about the election results.

Recent polls indicate Corbyn will comfortably beat his opponent Owen Smith.

The Labour leader also used the interview to respond to numerous anti-Corbyn missives from Harry Potter author J.K. Rowling. Corbyn said Rowling was a "wonderful author," but "she seems to have some differences with me at the moment."

One day in the far distant future we'll look back and we WONT LAUGH, LABOUR, BECAUSE THIS ISN'T BLOODY FUNNY. — J.K. Rowling (@jk_rowling) August 31, 2016