Germany is working hard to deport more Afghan criminals, said Interior Minister Nancy Faeser in Berlin on Thursday, a day after an Afghan asylum seeker was arrested for a deadly knife attack.

"We are the only country in Europe to have deported serious criminals back to Afghanistan for the first time since the Taliban rule. And I would like to make it very clear that we are working hard to deport further criminals to Afghanistan," said Faeser.

The interior minister also took aim at the EU's Dublin rules, under which someone's asylum application has to be processed in their first country of arrival.

The suspected attacker in the southern German city of Aschaffenburg had come to Germany via Bulgaria.

"We are already seeing once again that the Dublin system no longer works," said Faeser.

Acting Defense Minister Mohammad Yaqoob Mujahid on Thursday met with Mirdef Alqashouti, the Chargé d'Affaires of Qatar for Kabul, and described Qatar as a "friend and partner" of Afghanistan.

Enayatullah Khwarizmi, the spokesman for the ministry, said in a statement that Mujahid emphasized the importance of strengthening relations with Qatar.

Mujahid also expressed gratitude for Qatar's long-standing assistance and cooperation with the people of Afghanistan.

The statement added that the two sides discussed further cooperation in areas such as economic relations, trade, strengthening bilateral ties between Kabul and Doha, and other related issues.

On Wednesday, Yaqoob Mujahid also met with Faisal bin Talq al-Buqami, the Saudi Ambassador to Kabul, and stressed Riyadh's commitment to expanding economic, political, and humanitarian cooperation with Afghanistan.

China said Thursday it had lodged “solemn representations” with the Islamic Emirate of Afghanistan (IEA) over the killing of a Chinese mine worker in an attack.

“The Chinese side urgently lodged solemn representations with the Afghan side, demanding that (they) thoroughly investigate and punish the perpetrators,” China’s foreign ministry spokeswoman Mao Ning said, AFP reported.

“China is deeply shocked by the attack, strongly condemns it and expresses condolences to the victims,” Mao said.

Takhar police said Wednesday a Chinese national was killed by unknown gunmen in Takhar Province on Tuesday night.

Provincial police spokesman, Mohammad Akbar Haqqani, said that the man was travelling without informing security officials.

Haqqani said Wednesday that police had launched an investigation.

Daesh has since claimed responsibility for the shooting.