Russian President Vladimir Putin signed a key deal Monday with Saudi Arabia during a key visit for an OPEC+ grouping aimed at stabilising global oil prices and seeking to calm regional tensions with Iran. Putin’s visit follows attacks on Saudi oil installations that Saudi Arabia and the United States have blamed on Iran, an ally of Moscow. Following talks between Putin and Saudi King Salman, the two countries signed some 20 agreements and contracts worth billions of dollars on aerospace, culture, health, advanced technology and agriculture.