letter

The exchange of letters came against a backdrop of strained cross-border ties since a failed North Korea-US summit in 2019, and flaring tension after Pyongyang launched intercontinental ballistic missiles (ICBMs) last month, breaking a self-imposed 2017 moratorium.

Moon sent a letter on Wednesday and promised to continue to try to lay a foundation for unification based on joint declarations reached at summits in 2018, despite the "difficult situation," the North's official KCNA news agency said.

The star says such images put his two children in danger, particularly due to his wife's line of work.

Amal Clooney is a human rights lawyer who, the actor notes in his letter, puts terrorist groups on trial.

His comments were published by several trade magazines, including Variety, The Hollywood Reporter and Deadline.

The actor, who has starred in Gravity and Ocean's Eleven, said he and his wife are not on social media and are protective of their children's privacy.

The Met Police tested the substance and said it was not harmful. No arrests have been made and inquiries are ongoing.

The Evening Standard reports the letter was addressed to Prince Harry and Meghan Markle.

It was received on February 12, the day before a package containing white powder was sent to Westminster.

It is alleged the substance sent to St James's Palace was also white powder. Officers are looking into whether or not the two packages are linked.