Today in Focus

An investigation is under way into an arson attack on four ambulances belonging to a Jewish charity in north London. Efforts are being made to verify a claim of responsibility by a group known as Harakat Ashab al-Yamin al-Islamia (HAYI). Security sources have cautioned against a rush to tie Iran to arson and it has not so far been designated as a terrorist incident. Nosheen Iqbal speaks to chief reporter Daniel Boffey – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

The conflict in the Middle East is being fought from the air – except in southern Lebanon where Israel and Hezbollah are fighting a bitter ground war. Will Christou reports. Help support our independent journalism at theguardian.com/infocus

Donald Trump has delayed his deadline for Iran to open the strait of Hormuz, saying he is postponing strikes on Iranian power plants for a five-day period. The US president had threatened to ‘obliterate’ the regime’s power plants, while Tehran said in return it would ‘irreversibly destroy’ essential infrastructure across the Middle East, including vital water systems, in the conflict’s latest escalation. The war is now in its fourth week, as Trump declares the US and Iran had ‘good and productive conversations’, but what could come next? Lucy Hough speaks to the Guardian’s diplomatic editor, Patrick Wintour – watch on YouTube. Help support our independent journalism at theguardian.com/infocus

Lucia Osborne-Crowley on what we should learn from Jeffrey Epstein’s crimes. Help support our independent journalism at theguardian.com/infocus

On the evening of 29 December 2011, the police officer Clifton Lewis was moonlighting as a security guard at a Chicago minimart when two men walked in. They shot Lewis several times, then took off with his gun and police star. A week later, officers had their suspects: four men affiliated with a gang called the Spanish Cobras. For hours, under intense police questioning, they all said they didn’t do it. That didn’t seem to matter. This is episode one of Off Duty, an investigation by the Guardian’s Melissa Segura. Help support our independent journalism at theguardian.com/infocus