The Perth father of three children killed when MH17 was shot down has delivered a blistering attack on US President Donald Trump following his much criticised summit and media conference alongside Vladimir Putin.

Key points: Anthony Maslin blasted Donald Trump after his summit and media conference

Anthony Maslin blasted Donald Trump after his summit and media conference Mr Maslin criticised Mr Trump on social media for not making Vladimir Putin accountable

Mr Maslin criticised Mr Trump on social media for not making Vladimir Putin accountable When MH17 was shot down over the Ukraine in 2014 there were 298 people killed

Anthony Maslin's three children, Mo, Evie and Otis, and their grandfather Nick Norris were killed when the Malaysia Airlines flight came down over Eastern Ukraine four years ago yesterday.

In total, 283 passengers and 15 crew were killed when a Buk missile was fired at the Boeing 777 plane by what was determined to be Russian-backed separatist fighters.

Loading

In a Facebook post yesterday afternoon marking the anniversary, Mr Maslin laid into Mr Trump for his refusal to hold the Russian President to account for his country's involvement in the MH17 attack, in which 38 Australians died.

"Mr Trump, you invented and speak a lot about 'fake news'. But let's try talking about something that's not fake … let's call them irrefutable facts," Mr Maslin wrote.

"That passenger flight MH17 was shot out of the sky and 298 innocent people were murdered is an irrefutable fact.

"That the plane was hit by a Russian missile has been proven to be an irrefutable fact.

"That this killed our three beautiful children and their grandfather, and destroyed our life and many other lives in the process, is an irrefutable fact.

"That this happened four years ago today… is an irrefutable fact.

"That the man whose arse you've just been kissing did this, and continues to lie about it, is an irrefutable fact."

Mr Trump delivered a widely condemned performance alongside Mr Putin at the two leaders' first summit, in which he sided with the Russians against his own intelligence services over the issue of Russian interference with the US election.

Sorry, this video has expired Donald Trump says he saw no reason not to trust Vladimir Putin (Photo: AP/Alexander Zemlianichenko)

He also refused to hold his counterpart to account for issues such as Russia's annexation of the Crimean peninsula, its involvement in the Syrian conflict and the poisoning of four people in Britain with the nerve agent Novichok.

Trump backtracks amid 'pity'

Mr Trump has since backtracked after the torrent of criticism over his performance, saying he misspoke at their joint media conference when he said the word "would" instead of "wouldn't".

Sorry, this video has expired 'I said 'would' instead of 'wouldn't': Trump backtracks on Russia

He said he meant to say he saw no reason why it was not Russia that interfered in the election.

"I accept our intelligence community's conclusion that Russia's meddling in the 2016 election took place," he said.

But he added: "It could be other people also. A lot of people out there. There was no collusion at all."

Mr Maslin said what he felt towards President Trump and President Putin could not be described as anger.

"It's not anger that I feel towards the two of you, it's something much, much worse," he wrote.

"It's pity.

"You have no empathy for your fellow man, and you clearly have no idea what love is.

"So you have nothing."

Anthony Maslin (right) and Rin Norris lost their three children in the MH17 tragedy. ( AAP: Theron Kirkman )

'I can see their smiles'

Mr Maslin's wife and mother of the children, Rin Norris, also took to Facebook to mark the anniversary of the tragedy, using poetry to express her loss.

Loading

"Four years ago today … Or was it four minutes? Or maybe four centuries?" Ms Norris said.

"Sometimes experiences from the past pop into my head and I can't move, rendered immobile by loss and horror, staring at nothing and inside, trauma is being relived.

"The trauma of a loss so cataclysmic that it singled us out of all Australians, and made us different.

Thirty-eight Australians were among the 298 people who died when MH17 was shot down. ( Reuters: Maxim Zmeyev )

"When I close my eyes, I can see their smiles."

The final line of her post pointed to sentiments similar to those held by her husband.

"What do you see when you look at the bully?" she said.

Australia continues to hold Russia responsible

In a joint statement to mark the anniversary, Minister for Foreign Affairs Julie Bishop and Attorney-General Christian Porter made it clear they held Mr Putin's Russia responsible for the disaster.

"On 25 May 2018, Australia and the Netherlands announced that we hold Russia responsible for its role in the downing," they said in a statement yesterday.

"We hope that through negotiations with Russia we can open dialogue around the circumstances leading to the tragic loss of innocent lives."

"We owe that to the memory of the victims and their families and friends."