This handout picture provided by the Palestinian Authority's press office (PPO) shows Palestinian president Mahmud Abbas (R) meeting with Algeria's Foreign Minister Ahmed Attaf in Riyadh on April 27, 2024. US Secretary of State Antony Bliken is among leaders expected at a Saudi-hosted economic summit set to begin on April 28 with a strong focus on the grinding war in Gaza, organisers said. (Photo by Thaer GHANAIM / PPO / AFP) / === RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / HO / PPO " - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS === (Photo by THAER GHANAIM/PPO/AFP via Getty Images)