Donald Trump chatted with world leaders during a group photo session at the G20 summit, but walked by without appearing to acknowledge Saudi Crown Prince Mohammed bin Salman and Russian President Vladimir Putin.
In contrast, Mr Putin and the crown prince shared a smiley, enthusiastic greeting at the gathering.
The crown prince patted Mr Putin’s hand three times for emphasis as the two leaders took their seats next to each other.
The US president cancelled a formal sit-down with Mr Putin at the summit in Argentina over Moscow’s seizure of Ukrainian vessels.
