Officials in the United States and Mexico are working toward a plan to significantly limit travel across the border amid the coronavirus pandemic while still allowing trade to continue between the two countries.

Mexican Foreign Relations Secretary Marcelo Ebrard said Thursday that he proposed changes to Secretary of State Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE that “won’t paralyze economic activity and keep the border open to commerce and work,” The Associated Press reported. The official said more details will be released Friday.

Pompeo confirmed in a Thursday tweet that he and the Mexican official “have been working closely on travel restrictions that balance protecting our citizens from further transmission of #COVID19.”

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“Together, we can reduce public health risks and prioritize essential cross-border commerce and trade,” Pompeo continued.

#Mexico Foreign Secretary @m_ebrard and I have been working closely on travel restrictions that balance protecting our citizens from further transmission of #COVID19. Together, we can reduce public health risks and prioritize essential cross-border commerce and trade. — Secretary Pompeo (@SecPompeo) March 19, 2020

President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Wednesday said that the U.S. and Canada had agreed to close their border to nonessential travel, tweeting that “trade will not be affected” between the two countries. U.S. Customs and Border Protection (CBP) officials also briefed businesses leaders Thursday on further plans to block nonessential travel, said Paola Avila, chair of the Border Trade Alliance, according to the AP.

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The move on the southern border could limit all tourists and other visits, Avila, who participated in a call with CBP officials, confirmed to the AP. Officials said the changes could be announced as early as Friday.

U.S. officials issued guidelines Thursday defining critical workers amid the coronavirus pandemic, ranging from grocery store and restaurant employees to farmworkers who would not be blocked going to their jobs. Mexico is set to release similar guidelines on U.S. visitors, according to the AP.

The U.S. accounts for approximately 75 percent of Mexican exports, and Mexico is the U.S.’s largest trading partner.

The Trump administration is also reportedly planning to turn back asylum-seekers at the northern and southern borders, in addition to other migrants seeking to cross the border illegally, according to a New York Times report.

The State Department Thursday issued a level four travel advisory applying to all countries, calling on Americans not to travel internationally and urging U.S. citizens who are currently abroad to return home.

There are at least 14,000 people in the U.S. who have tested positive for the coronavirus, and at least 205 people have died, according to data compiled by Johns Hopkins University.