As diplomatic pressure piles on Saudi Arabia, global defense and foreign ministers have been meeting in neighboring Bahrain for a major security summit. US Defense Secretary James Mattis delivered the keynote speech, and as Jacob Greaves reports, he named and shamed Riyadh for Khashoggi's murder.

JAMES MATTIS US DEFENSE SECRETARY "The murder of Jamal Khashoggi in a diplomatic facility must concern us all greatly, as US secretary of State Pompeo stated, the United States does not tolerate this kind of ruthless actions to silence Mr. Khashoggi a journalist through violence, failure of any one nation to adhere to international norms and the rule of law undermines regional stability at a time when it is needed most."

JACOB GREAVES MANAMA "Notably here Mattis mentioned working with the PEOPLE of Saudi Arabia, but didn't address the Saudi Crown Prince directly. Another major point not on the table- arms exports. This underpins the difficult spot the Khashoggi case has left the US in dealing with its main regional ally, Saudi Arabia is the world's biggest oil producer and crucially the single largest buyer of US weapons. If we boil down into what's at stake here, between 2009 and 2016, arms exports to the Kingdom totaled 65 billion dollars and US President Donald Trump has made the slogan 'Buy America' a centre piece of his administration. Now the Khashoggi killing has raised the question of whether a much-touted new US deal of 110 billion dollars arms package for Saudi will manage to get past the US Congress. As we've seen here it's an issue not going away, with the Saudi Foreign Minister grilled on the issue at this summit."

ADEL AL-JUBEIR SAUDI ARABIAN FOREIGN MINISTER "Unfortunately, there has been this hysteria in the media about Saudi Arabia's guilt before the investigation is completed."

JACOB GREAVES MANAMA "This all underlines America's difficult situation, Mattis spoke of his administration's twin imperatives. Squaring the need to be seen to hold Saudi accountable, whilst highlighting Saudi's importance for America's military presence in the region, in being a strategic ally against Iran and a source of oil for global markets as the US sanction Tehran's energy capabilities. Here we've seen the Trump administration is so far unwilling to come down on Saudi Arabia in a way that may endanger those interests."