The United States in Japan and Singapore are planning to tighten security before major theater and sports events following a suicide bombing in Britain that killed at least 22 people.
Britain was on its second highest alert level of "severe", which means that an attack of militants is very likely after the explosion of the suicide bomb At the end of a concert by US singer Ariana Grande in Manchester on Monday.
The US Department of Homeland Security said it was closely monitoring the situation in Manchester and that the US public could undergo increased security at public events.
Japan said that it had begun to collect information. "We have strengthened our position by creating an information gathering unit dedicated to international terrorism," Yoshihide Suga told reporters.
In Singapore, the Britney Spears concert organizer in June said they were considering new measures.
"We are definitely looking to tighten security," said Yogesh Mehta, project manager at IME Entertainment Group.
"All our events are authorized by the police and are normally advised by the licensing department on the precautions to be taken, how many armed guards we need, so we work closely with them."
Singapore, which is organizing a security summit between 2 and 2 June bringing together the chiefs of defense and military of the Asia-Pacific, has made amendments to the Law on Public Order last month.
The organizers of the event must have informed the police a month before they wait for more than 5,000 people. And the police may refuse to authorize a public gathering if it has a direct political end or involves foreigners.
Hong Kong's AsiaWorld Exposition, where Ariana Grande is expected to hold a concert in September, said it would strengthen security measures for all concerts and events. In addition to luggage inspection, there will be metal detectors, he said in a statement, adding that he was also planning to introduce search dogs for any suspicious items .
Hong Kong is already on the alert before a planned visit of Chinese President Xi Jinping to mark the 20th anniversary of the city's handover to Beijing on July 1 when the new leader of the new British colony will also be sworn in.
The Melbourne Cricket Ground, Australia's largest sports arena, said it was studying the procedures. Prime Minister Malcolm Turnbull said the government is working closely with other countries on strategy.
"While the level of threat to Victoria remains unchanged and there is no known threat to the CWM, we continue to receive advice from the competent authorities and together review our processes Security accordingly, "the club spokesman said referring to the state of Melbourne Melbourne is the capital.
SM Investment Corp., whose Mall of Asia Arena in the Philippine capital will host Ariana Grande in August, said it would take all precautions.
"Our security is always reinforced especially for large crowds like this one," said Investment Director SM Corazon Guidote.