The crown prince attended the Group of 20 summit and has been visiting friendly Arab nations over the past week on his first global tour since Saudi agents killed Washington Post columnist Jamal Khashoggi in the kingdom's Istanbul consulate on October 2.
The visit would focus on "partnerships and investment projects", the Algerian presidency said before the prince arrived in Algiers late Sunday on a flight from Mauritania.
US intelligence agencies have evidence that Crown Prince Mohammed and al-Qahtani had 11 exchanges that roughly coincided with the hit team's advance into the Saudi Consulate in Istanbul, where Khashoggi was murdered.
Khashoggi's killing has put mounting pressure on Riyadh and Prince Mohammed, who Turkish officials - and reportedly the Central Intelligence Agency - have concluded was behind the critic's death.
May met leaders including the Canadian prime minister, Justin Trudeau, the Australian prime minister, Scott Morrison, and the Japanese prime minister, Shinzō Abe, all of whom expressed some scepticism about the state of her Brexit deal.
Theresa May has offered "warm words" on human rights, but no action against Saudi Arabia on the war in Yemen or the killing of a Saudi journalist, Jeremy Corbyn has said, challenging May's claim to have been "robust" with the Saudi leader at the G20 summit.
DJ apologises after asking Ballon d'Or victor Hegerberg to twerk
Matildas star Sam Kerr finished in fifth spot in the voting, but said just having the award meant women's football had won. Picking up the maiden award, Solveig proceeded to ask Hegeberg whether or not she could, nay would, " twerk ".
Keep an eye on the sky for another SpaceX launch this week
One of these interstellar-bound objects will also pay tribute to Robert Henry Lawrence Jr., the first African -American astronaut. SpaceX also says it'll attempt to recover the fairing, or nose cone, of the rocket using its giant net-on-a-ship approach.
North Atlantic Treaty Organisation treads carefully in Ukraine-Russia sea spat
Poroshenko said he tried to arrange a phone call with Putin to discuss the standoff but the Kremlin has refused. In response Mr Poroshenko declared martial law in 10 Ukrainian regions which are close to Russian Federation .
The adviser, Saud al-Qahtani, topped the list of Saudis who were targeted by US sanctions last month over their suspected involvement in Khashoggi's killing.
It was jointly denounced by 17 intellectuals, journalists, Muslim scholars and other figures in the North African country, in a statement obtained by AFP.
They also addressed regional developments.
After receiving word from Saudi Arabia that authorities had seen messages between the pair, Abdulaziz informed Khashoggi who simply wrote back: 'God help us'.
Putin said he had agreed with Prince Mohammed to renew a pact on cutting oil production by their two nations, the world's leading exporters of crude. Qatar denies the allegations.
Earlier in the day, MBS made a brief visit to Mauritania where he signed a series of agreements with President Mohamed Ould Abdel Aziz.