London police said a controlled explosion was carried out as a precaution outside Buckingham Palace late Tuesday after a man was arrested there on suspicion of possessing an offensive weapon.

The United Nations chief warned on the eve of World Press Freedom Day that the media is under attack in every corner of the world and urged all nations to stop the targeting of truth and those who report it.

Authorities in the U.S. and Europe arrested nearly 300 people, confiscated over $53 million, and seized a dark web marketplace as part of an international crackdown on drug trafficking that officials say was the largest operation of its kind.