The United States' second-most senior diplomat expressed regret Sunday over the immigration raid at a Hyundai car battery plant in Georgia earlier this month.

A charter plane is expected to repatriate about 300 South Korean workers who were among 475 arrested during a U.S. Immigration and Customs Enforcement raid at a construction site for an electric vehicle battery plant being built in Ellabell, Georgia. Photo by Erik S. Lesser/EPA UPI

Sept. 14 (UPI) -- The United States' second-most senior diplomat expressed regret Sunday over the recent immigration raid at a Hyundai car battery plant in Georgia.

U.S. Deputy Secretary of State Christopher Landau met Sunday with First Vice Minister of Foreign Affairs Park Yoon-joo to discuss cooperation in the continued efforts to resolve the diplomatic spat stemming from the raid, South Korea's Foreign Ministry said in a statement.

During the meeting, Park highlighted the "uncomfortable treatment" faced by hundreds of South Korean nationals who were detained and deported after the raid and the shock felt across the country at the incident.

"Deputy Secretary Landau expressed deep regret over the incident and proposed using it as a turning point to improve the [visa] system and strengthen the [Republic of Korea-United States] relationship," the foreign ministry said. Landau was also said to have recognized the significant contributions and investments made by Korean companies for the "revitalization of the U.S. economy and manufacturing industry."

He added that President Donald Trump is also "highly concerned" about this issue, and that he will ensure that Korean workers who return to the United States will not difficulty with reentering, South Korean officials said.

"The United States welcomes and encourages foreign investment in our country and therefore logically welcomes and encourages the personnel necessary to get those investments up and running," Landau said in a post to social media after the meeting.

"These are the kind of visitors we want, who are creating American jobs and prosperity right here at home. Korean companies are poised to make massive new investments in our country in shipbuilding among other industries."

More than 300 workers from South Korea were arrested earlier this month during the raid at the factory, which Hyundai Motor Group and LG Energy Solution operate. More than 150 other workers were also detained.

The raid was announced by the Bureau of Alcohol, Tobacco, Firearms and Explosives and included officers from other agencies, such as Homeland Security Investigations and U.S. Immigration and Customs Enforcement. It marked one of the largest immigrant raids in modern American history.

Last Sunday, a senior South Korean official said that the country will charter a plane for the return of hundreds of workers who were detained.