The Federal Communications Commission on 28 July announced a ban on humanoid robots from China including the popular Unitree G1 model. The Guardian's technology journalist Nick Robins-Early explains the recent popularity of these trending robots and why the US government says they are a risk to the country's national security

How the US-Israeli war against Iran exploded into a regional conflict, as Tehran retaliated with strikes across the Middle East

• US-Israel war on Iran – live updates

A US-Israeli war against Iran that began on Saturday with bombing and missile attacks that killed Iran’s supreme leader, Ali Khamenei, has exploded into a regional conflict, with Tehran retaliating by launching strikes across the Middle East.

On Tuesday, Israel’s military launched a ground invasion of Lebanon, where it has been carrying out intense strikes after Iran’s ally, Hezbollah, fired rockets across the frontier.

Missiles and bombs landed across Iran, hitting political and security targets in Tehran, including supreme leader’s residence

• US-Israeli attack on Iran – live updates

• US and Israel strikes on Iran – what we know so far

The US-Israeli war against Iran entered its second day on Sunday, as news of the assassination of the country’s supreme leader, Ali Khamenei, shook the Islamic Republic and the wider region.

Donald Trump announced Khamenei’s death while Israel claimed to have killed at least 40 senior Iranian commanders in the first day of attacks. Both countries continued to pound Iran, conducting hundreds of airstrikes across the country overnight and on Sunday.

Despite the apparent loss of a significant portion of its senior military and political leadership, Iran did not slow its retaliation on Sunday, bombing targets in the Gulf and unleashing waves of ballistic missiles towards Israel.

Warning: this video contains footage that may be distressing to some viewers

At about 9am on Saturday, US federal agents shot and killed Alex Pretti, a Minneapolis nurse who was observing immigration officers in the city. The Guardian’s video team has pieced together footage showing the attack from different angles

A decision on China’s controversial mega-embassy in London is imminent, with Chinese officials and British diplomats in Beijing anxiously awaiting the outcome of a planning application that could soon be approved. MPs from across the political spectrum have condemned the proposal, but UK security services say they can contain the espionage risks posed by the expanded site, which sits close to sensitive data cables linking to the City of London

• UK politics live – latest updates

While the cause of the disaster is still under investigation, videos and photos suggest the blaze spread quickly

Switzerland is reeling from one of its worst tragedies after a fire ripped through an Alpine bar during a New Year’s Eve celebration, leaving more than 40 people dead and dozens of others with serious burn injuries.

The prosecutor in charge of the case said on Friday that initial investigations suggested the most likely cause of the fire was sparkling flares being carried too close to the ceiling.