Manchester concert suicide attack prompts security rethinks worldwide

Manchester Arena in Manchester (Photo Courtesy)

Countries from the United States to Japan and Singapore are considering tightening security ahead of major theatre and sports events following a suicide bomb attack in Britain that killed at least 22 people.

Prime Minister Theresa May called an emergency meeting with intelligence chiefs on the deadliest militant assault in the country since four British Muslims killed 52 people in suicide bombings on London's transport system in July 2005.