The highly-anticipated memoir released by Prince Harry has gone gangbusters.

It’s now the fastest-selling non-fiction book of all-time – But now Prince Harry is at the centre of a diplomatic row.

Iran has accused Prince Harry of “war crimes” after he shared news he had killed 25 Taliban in his memoir ‘Spare’.

The 38-year-old has previously denied boasting about the killings in recent TV interviews such as with The Late Show in the U.S.

But Iranian authorities have slammed Prince Harry’s words.

“The British regime, whose royal family member, sees the killing of 25 innocent people as removal of chess pieces and has no regrets over the issue, and those who turn a blind eye to this war crime, are in no position to preach others on human rights,” a statement said.

It follows an initial tweet earlier on by the Iranian foreign ministry spokesman who calls out London’s violation of law that has been met with a decisive response from the Iranian intelligence.

This comes as both the Taliban and British military figures have criticised Prince Harry for admitting in his memoir to killing 25 people in Afghanistan.