Explosions have been reported in Tehran as tensions escalate in the growing confrontation involving Iran, with the United States warning that the current phase of attacks could mark the most intense day of military action so far.

Speaking earlier, US Defence Secretary Pete Hegseth said Tuesday would likely be the “most intense” day of strikes targeting Iran since the escalation began.

Meanwhile, one of the most significant Iranian attacks reported on Tuesday involved a drone strike at the Ruwais Industrial Complex in Abu Dhabi, home to the largest oil refinery in the Middle East.

According to the Abu Dhabi Media Office, a fire broke out at the facility following the strike, but authorities confirmed that no injuries were reported. Officials have not yet released additional details about the extent of the damage.

Sources cited by both Reuters and Agence France-Presse said the refinery halted operations as a precaution after the incident.

The complex is operated by the state oil company Abu Dhabi National Oil Company (ADNOC) and has the capacity to produce about 922,000 barrels of oil per day, making it a critical part of the region’s energy infrastructure.

Elsewhere, the defence ministry reported that eight ballistic missiles and 26 drones were intercepted on Tuesday as air defence systems responded to incoming threats. Officials said that nine drones were able to bypass defences and reach their intended areas.

Authorities have also adjusted the country’s national early warning system. Alerts sent to mobile phones overnight were noticeably quieter than usual, aimed at reducing disruption for residents while still providing notification of potential threats.

Earlier in Dubai, residents received a standard text message notification instead of the loud, repeated alarm tone that had previously accompanied attack alerts.

In Washington, US Press Secretary Karoline Leavitt was questioned about reports that an Iranian school had been struck and how long it might take to determine whether US forces were responsible.

Leavitt said the United States Department of Defense was investigating the incident and that the inquiry remains ongoing.

South Korea has entered a new chapter in its democratic journey after former president Yoon Suk Yeol was sentenced to life imprisonment for orchestrating an insurrection through an attempted imposition of military rule.

A court in Seoul ruled that Yoon sought to undermine constitutional order by deploying military forces to seal off the National Assembly of South Korea and ordering the detention of political opponents on 3 December 2024. Presiding judge Ji Gwi-yeon said the actions caused profound harm to the nation’s democratic foundations and warranted severe punishment. Prosecutors had pushed for the death penalty.

Although the martial law order lasted only a few hours before being overturned by lawmakers, its aftermath has reshaped the political landscape. Large crowds of Yoon’s supporters gathered outside the court ahead of sentencing, holding banners and expressing hope for his return. Across from them stood demonstrators demanding the harshest penalty.

Yoon remained composed as the ruling was delivered. His legal team rejected the judgment, claiming it lacked evidentiary basis and accusing the court of bias. An appeal from either side would move the case to the Supreme Court of Korea, potentially extending legal proceedings for months.

The crisis began when Yoon announced martial law during a televised address, citing the need to defend the state from forces he alleged were sympathetic to North Korea. However, the move unfolded against a backdrop of mounting domestic pressure, including legislative gridlock and corruption allegations involving his wife.

Lawmakers ultimately forced their way into the National Assembly to reverse the decree, triggering a period of political upheaval that led to Yoon’s impeachment and multiple prosecutions of senior officials.

The court has already handed down significant sentences to others implicated in the plot. Former prime minister Han Duck-soo received a 23-year prison term, while former defence minister Kim Yong-hyun was jailed for 30 years after advising the martial law order.

Additional convictions have followed for key figures including ex-interior minister Lee Sang-min, former intelligence commander Roh Sang-won, and ex-police chief Cho Ji-ho—with judges describing the episode as an “insurrection from the top”.

US President Donald Trump has warned that Canada could face sweeping trade penalties if it deepens its commercial ties with China, signalling a fresh phase in North American trade tensions even as global economic relationships continue to evolve.

In a message posted on his Truth Social platform on Saturday, Trump said the United States would impose a 100% tariff on all Canadian goods entering the country should Ottawa proceed with a trade agreement with Beijing. “If Canada makes a deal with China, it will immediately be hit with a 100% Tariff against all Canadian goods and products coming into the U.S.A.,” he wrote.

The warning comes amid increasingly strained relations between Trump and Canadian Prime Minister Mark Carney. Tensions have intensified following Carney’s recent speech at the World Economic Forum in Davos, Switzerland, where he called for smaller and mid-sized nations to assert themselves amid shifting global power structures. His remarks were widely interpreted as a pushback against the dominance of major powers in shaping the world economic order.

Carney has also held high-level talks with Chinese President Xi Jinping, after which Canada announced it had reached a trade agreement with China. The deal reportedly includes cooperation on electric vehicles, a sector seen as central to the future of global manufacturing and the green energy transition.

Responding to those developments, Trump again referred to the Canadian leader as “Governor Carney” and accused Canada of attempting to serve as a conduit for Chinese exports into the US market. He wrote that if Carney “thinks he is going to make Canada a ‘Drop Off Port’ for China to send goods and products into the United States, he is sorely mistaken.”

While Trump did not outline a specific timeline or provide further details on how the proposed tariffs would be implemented, his remarks echoed earlier rhetoric. Last year, during a previous dispute, Trump repeatedly described Canada as America’s “51st state,” labelled its leader a “governor,” and even suggested the US might seek to acquire the country outright — comments that drew strong reactions north of the border.

Despite these sharp exchanges, relations between Washington and Ottawa had shown signs of stabilising in recent months. However, Trump’s renewed focus on territorial ambitions regarding Greenland and his critical comments about Nato have again placed him at odds with both Canadian and European leaders.

In Davos this week, Carney stopped short of naming Trump directly but cautioned that the US-led global order was at risk of a “rupture,” language that appeared to provoke a forceful response from the US president. Speaking after Carney, Trump asserted the depth of economic ties between the two neighbours, saying, “Canada lives because of the United States.”