Meghan Markle's estranged nephew was caught carrying a knife in London, just hours after the royal wedding!

As RadarOnline.com has learned, Tyler Dooley allegedly told bouncers at a local nightclub that he had a four-inch knife with him, because President Donald Trump said London was "like a war-zone" due to street crime.

According to various reports, 25-year-old Dooley — who manages his own cannabis business — voluntarily handed over the weapon at the door, but ran off when a local told him he would be arrested.

London Police told The Sun that they recovered the knife at 1:55 am on Sunday, but did not arrest Dooley because he left the scene.

As RadarOnline.com readers know, Dooley was not the only family member to show up to London uninvited. While both he and Thomas Markle Jr. were snubbed from Meghan Markle, 36, and Prince Harry's wedding, they were both photographed in the city, celebrating their relative's big day!