MACC's release of wiretapped recordings of a prime minister's phone conversation can affect the country's diplomatic relations and its interests with other nations, said Najib Abdul Razak.

The former premier said this would be much so when the recordings released to the public include conversations with other heads of state.

"I want to repeat that this is a revelation that has never happened in the history of our country.

"And secondly, I was a sitting prime minister at that time....