Harry and Meghan letter sent to palace 'race hate crime'

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.