Coronavirus concerns led Saudi Arabia to cut off air and sea travel with Bahrain, Egypt, Iraq, Italy, Kuwait, Lebanon, South Korea, Syria and the United Arab Emirates. The kingdom had earlier closed off its land borders as well.
The outbreak has infected a host of senior officials, politicians, clerics and members of the elite Revolutionary Guards in Iran, the fourth worst-affected nation after China, South Korea and Italy.
"We are deeply concerned both by the alarming levels of spread and severity and by the alarming levels of inaction. We have therefore made the assessment that COVID-19 can be characterised as a pandemic," WHO Director General Tedros Adhanom Ghebreyesus told a news conference on Wednesday.
"The Prime Minister is in good health with no symptoms. As a precautionary measure and following the advice of doctors, he will be in isolation for a planned period of 14 days," the statement added.
"It has been decided that all borders will remain closed for 15 days," Foreign Minister Shah Mehmood Qureshi told the local ARY and Dunya TV networks. "International flights will operate only out of Karachi, Lahore and Islamabad airports," he said.
Spain confirmed another 838 deaths in 24 hours from coronavirus on Sunday, a new daily record bringing the total number of deaths to 6,528, according to health ministry figures.
The worldwide number of officially confirmed fatalities from the novel coronavirus rose to 31,412 on Sunday, according to a tally compiled by AFP at 1000 GMT from official sources.
Shimura, who attracted fans of all generations with his slapstick comedy and funny faces, had been treated at a Tokyo hospital and died on Sunday, according to his agency, Izawa Office.
The Southeast Asian nation is among the world's most open economies and seen as a gauge of the health of the global trade. Last week, it posted a sharp decline in first quarter gross domestic product and slashed growth projections.
Iran had temporarily released around 100,000 prisoners as part of measures taken to contain the pandemic, leaving an estimated 50,000 people behind bars, including violent offenders and so-called "security cases,” often dual nationals and others with Western ties.