1. A powerful explosion set on fire a lithium battery factory in South Korea, killing 22 workers, most of them Chinese nationals.

2. Death toll rises to 20 after gunmen attack Russia's Dagestan.

3. Iranians head to the polls this Friday, and all six candidates have been wooing youthful voters.

4. Beijing wants the EU to scrap its preliminary tariffs on Chinese electric vehicles by July 4.

5. China's ByteDance is working with US chip designer Broadcom on developing an advanced AI processor.