State media in Iran confirmed that explosions occurred in several domestic regions, including Bandar Abbas, Tabriz, and Bushehr, where the nation's sole operational civilian nuclear facility is located.
In retaliation, Iran launched strikes against Bahrain, Kuwait, and Jordan, which are nations that currently host US military personnel.
Global energy markets reacted to the volatility, with Brent crude futures dipping 0.4% to $88.87 a barrel after previously reaching a one-month high.
Concurrently, US West Texas Intermediate crude for September delivery stabilized at $82.47 per barrel during early Tuesday trading.
The recent military escalation followed warnings from Donald Trump, who declared that Iran would pay "many times over" after several US service members were killed over the weekend.
Domestic political pressure has intensified as Democrats call for an immediate reversal of the resumed conflict due to rising anxieties over casualties.
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Meanwhile, the US confirmed the Lebanese army has started overseeing security in three southern villages, testing a diplomatic deal involving Israeli withdrawal and the disarmament of Hezbollah.
