Singapore tightens COVID-19 measures, travel bubble unlikely
People wear masks and observe social distancing while lining up to pay at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo

People wear masks and observe social distancing while lining up to pay at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo

May. 14, 2021 05:27 AM EDT
People wear face masks while shopping for groceries at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo)

People wear face masks while shopping for groceries at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo)

May. 14, 2021 05:26 AM EDT
Shelves with reduced stocks of toilet paper are seen at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo)

Shelves with reduced stocks of toilet paper are seen at a supermarket in Singapore, Friday, May 14, 2021. Singapore further tightened its COVID-19 measures as it sought to control an increase in untraceable coronavirus infections in the city-state. (AP Photo/Zen Soo)

May. 14, 2021 05:41 AM EDT