BERLIN — Three people suspected of spying for China and facilitating the transfer of information on technology with potential military uses were arrested in Germany on Monday.

Prosecutors said that the three German citizens are accused of having acted for Chinese intelligence since some point before June 2022. They are also suspected of violating German export laws.

One of the suspects, identified only as Thomas R. in line with German privacy laws, was allegedly an agent for an employee of China’s Ministry of State Security and procured information in Germany on “militarily usable innovative technologies” for that person, federal prosecutors said in a statement.

To do that, prosecutors said, he used Herwig F. and Ina. F, a couple who own a company in Duesseldorf that was used to contact and work with German researchers.

The couple allegedly set up a research transfer agreement with an unidentified German company, the first step in which was to draw up a study for a Chinese partner on the technology of machine parts that could be used for powerful ship engines, including those in battleships. Thomas R.’s handler at the MSS was behind the Chinese partner and the project was financed by the Chinese state, prosecutors said.

At the time of the arrests, the suspects were in negotiations on further research projects that could be useful for expanding the combat strength of the Chinese navy, they added.

The suspects also procured with MSS funding a special laser and exported it to China without permission, although it was classified as a “dual-use” instrument under European Union rules, prosecutors said.

The homes and offices of the suspects, who were arrested in Duesseldorf and in Bad Homburg, near Frankfurt, were searched.