India, June 16 -- Indian shares look set to open on a muted note Tuesday, with focus likely to remain on geopolitical and tariff headlines.

U.S. President Donald Trump abruptly cut short his attendance at the Group of Seven (G7) summit, hours after issuing a stark warning for civilians in Tehran to evacuate "immediately" as Israeli airstrikes on the Iranian capital reportedly escalated.

Shortly after Trump's post, Iranian media reported explosions and heavy air defense activity over Tehran early Tuesday. Israel's army warned that it had detected new missiles launched from Iran.

Meanwhile, the U.S. and Japan have made little headway in bridging gaps over tariffs at their summit on Monday, denting hopes for a trade deal between the countri...