London: Anthony Maslin, the Perth father whose three children were killed on Malaysia Airlines Flight MH17, has let rip at Donald Trump, accusing him of "kissing the arse" of Russian President Vladimir Putin.

Maslin and Rin Norris' children, Mo, 12, Evie, 10 and Otis, 8, died when MH17 was shot down over Ukraine by a Russian missile on July 17, 2014 - exactly four years ago.

In an open letter on Facebook, Maslin called on the President to stop hiding behind "fake news" and look at the "irrefutable facts".

He released a new photograph of his dead children, showing Evie wearing a checked school dress, her hair in two plaits, grinning and sitting in the middle of her two brothers.