U.S. President Donald Trump signed an executive order on Friday that may impose a 25% tariff on countries that do business with Iran.

The order comes as tensions between Iran and U.S. continue to simmer even as the two countries engaged in talks this week.

Naemullah Ayoubi, Director General of Drug and Health Products Regulation at Afghanistan’s Ministry of Public Health, has departed for Turkey on an official visit accompanied by a technical delegation.

The Ministry of Public Health said the delegation will hold meetings with officials from Turkey’s pharmaceutical regulatory authority and discuss a number of key issues related to the regulation of medicines and health products.

The delegation is also scheduled to visit several pharmaceutical manufacturing factories in Turkey.

According to the ministry, the visit aims to strengthen coordination between the two countries in the production and import of medicines, in order to ensure the availability of high-quality and affordable pharmaceuticals for people in Afghanistan in both the short and long term.

Former U.S. special envoy for Afghanistan, Zalmay Khalilzad, says Washington is largely satisfied with the Islamic Emirate of Afghanistan’s (IEA) efforts against terrorism, though progress in broader relations remains hindered by the issue of prisoners.

In an interview with NDTV, Khalilzad said the United States views the detention of at least two American citizens in Afghanistan as the primary obstacle to improving ties.

Khalilzad highlighted what he described as a “significant degree of satisfaction” in the U.S. assessment of the IEA’s counterterrorism commitments under the Doha Agreement. He said the IEA continue to fight Daesh, a group they have long considered an enemy. Many Daesh militants, he added, have been pushed out of Afghanistan and are now in Pakistan.

At the same time, Khalilzad said concerns remain regarding human rights and the political role of non-IEA Afghans.