![](http://www.ecns.cn/hd/2021/07/13/dcb51870d5834f50b2a71f5bdcfb906b.jpg)
Police officers conduct a security sweep of the Tokyo Olympic Main Press Center in Tokyo, Japan, July 12, 2021. (Photo/Agencies)
![](http://www.ecns.cn/hd/2021/07/13/0f3dcf3311ed407f82045aeae235a3e4.jpg)
Police officers conduct a security sweep of the Tokyo Olympic Main Press Center in Tokyo, Japan, July 12, 2021. (Photo/Agencies)
![](http://www.ecns.cn/hd/2021/07/13/a8f886c0f86d40faa7976cdc6bf991c3.jpg)
Police officers conduct a security sweep of the Tokyo Olympic Main Press Center in Tokyo, Japan, July 12, 2021. (Photo/Agencies)
![](http://www.ecns.cn/hd/2021/07/13/2ba35725a1a44730affe91e5f1f7a8c2.jpg)
Security personnel conduct a security sweep of the Tokyo Olympic Main Press Center in Tokyo, Japan, July 12, 2021. (Photo/Agencies)
![](http://www.ecns.cn/hd/2021/07/13/0d1d07ba91064001bc34c3468ad52171.jpg)
General view of the coronavirus disease (COVID-19) testing area and saliva sample collection room at the Tokyo Olympic Main Press Center in Tokyo, Japan, July 12, 2021. (Photo/Agencies)