Regional allies, meanwhile, have thrown their support behind the Crown Prince.
"This is the first such project in the kingdom", Said al-Shahrani noted, adding that Riyadh wants to diversify the sources of the country's income and reduce its dependence on oil thus speeding up the country's economic development.
In this March 20, 2018, file photo, US President Donald Trump shows a chart highlighting arms sales to Saudi Arabia during a meeting with Saudi Crown Prince Mohammed bin Salman in the Oval Office of the White House, in Washington.
"Tunisian civil-society groups are organizing protests against bin Salman's scheduled visit on Tuesday", Sakina Abdel Samad, a member of the Tunisian Journalists' Syndicate, told reporters on Monday at the syndicate's Tunis headquarters. The banner reads, "No to the desecration of Tunisia".
He said: "We have an important strategic partnership with Saudi Arabia involving defence and security co-operation which has saved lives on the streets of Britain". His remains have yet to be found.
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A Republican senator privy to the intelligence also challenged Trump's denial this week that the CIA had concluded that the crown prince ordered the October 2 assassination. It's unclear whether Tunisian authorities will take action on the complaint.
Tunisia also has strong ties with Turkey, whose relations with Saudi Arabia have been strained by the Khashoggi killing.
Saudi Arabia has been put under intense worldwide pressure over the killing and has brought charges against a number of suspects, while denying the crown prince was involved.
"Universal jurisdiction cases are an increasingly important part of worldwide efforts to hold those responsible for atrocities accountable, provide justice to victims who have nowhere else to turn, deter future crimes, and help ensure that countries do not become safe havens for human rights abusers", the statement highlighted. Turkish President Recep Tayyip Erdogan, who is expected to attend the summit, was instrumental in the global backlash the prince now faces.
They stressed that: "Saudi Arabia is a country that is not governed by the law and does not have a credible and independent judicial system in its principles of justice".
He was reportedly dismembered in what Saudi Arabia said was a "rogue" operation, but Central Intelligence Agency analysis leaked to the USA media pointed the finger at Prince Mohammed.
The Saudi crown prince is visiting Tunisia on Tuesday as part of a tour of several Arab countries on his first trip overseas since Khashoggi's murder, which has strained Saudi Arabia's ties with the West and battered his image overseas.