Police are investigating a suspicious white powder and a racist letter that was addressed to soon-to-be-newlyweds Prince Harry and Meghan Markle reports the Evening Standard. 

The letter was received on February 12, and delivered to the  St.James’ Palace. Officers from the Metropolitan Police’s counter-terrorism were called to investigate.

The following day, a package filled with white powder was delivered to the parliament. Investigators are unsure if these two incidents are linked, however, they are treating both events as a "racist hate crime." As of now, there have been zero arrests. 

The packages never made it to the royal couple, fortunately, but they both have been informed. 

This incident has put security on high alert, particularly given that Meghan and Harry are set to have their fairytale wedding Saturday, May 19 at St George’s Chapel in Windsor Castle. 

This is one of the first scares for the couple since they announced their engagement in November. The couple has already taken precautions and has 24-hour security. 

Police are taking the white powder as a threat because it could have been laced with a dangerous bacteria that can cause flu-like symptoms. An infection can occur by breathing, ingesting or having the powered in contact with the skin. The powder was ultimately found to be harmless, however.

This threat has been a hateful tactic used since 2001. In the early 2000s the use of white powered left five people dead. Earlier, this month police investigated a similar substance sent to Barack Obama's house in Washington D.C., and a member of the Trump family received an angry letter with white powder recently as well.