Elite police shot dead three gun-toting family members after landing in a helicopter on a remote Queensland property where two young police officers were murdered, another wounded and a neighbour killed during a routine inquiry about a missing school principal.

An emotional minute’s silence was held for constables Rachel McCrow and Matthew Arnold, outside Tara and Chinchilla police stations at 12.30pm on Tuesday.

Annastacia Palaszczuk’s Labor Party would have had no clear path to victory if an election had been held last weekend, exclusive new polling reveals.

And a new personalised vaccine against melanoma has almost halved the rate of recurrence and death in a major turning point described as cancer’s “penicillin moment”.

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