Controversial veteran radio broadcaster Howard Sattler says he is "flabbergasted" after being sacked by 6PR on Friday afternoon.

Radio 6PR general manager Martin Boylen made the announcement on air about 2.30pm (WST).

The presenter was initially suspended from his 6PR Drive program after a bizarre interview with the Prime Minister in which he asked if her partner Tim Mathieson was gay.

6PR management has since apologised to Julia Gillard and says the questions posed by the host were "disrespectful and irrelevant".