Berlin — German authorities say police have arrested four suspected members of the Islamic State of Iraq and Syria (ISIS) who were planning an attack on American military facilities. Federal prosecutors said the suspects were arrested by tactical police units early Wednesday at various locations in the western state of North Rhine-Westphalia.

They identified the men as Azizjon B., Muhammadali G., Farhodshoh K. and Sunatullokh K. - all citizens of Tajikistan. The suspects' surnames weren't released for privacy reasons.

The men's alleged leader, a 30-year-old Tajik man identified only as Ravsan B., has been in jail since March 2019 on unspecified charges.

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All the suspects will be charged with membership in a terrorist organization.

Prosecutors said the men joined ISIS in January 2019 and were instructed to form a cell in Germany. They reportedly first planned to carry out an attack in Tajikistan but later shifted their target to Germany, including U.S. Air Force bases in the country and a person they deemed critical of Islam.

Throughout, they are alleged to have been in contact with two high-ranking ISIS figures in Syria and Afghanistan.

Prosecutors said the group had already obtained firearms and ammunition to carry out their attacks, while Ravsan B. had ordered materials to build an explosive device.

In order to pay for their plans, Ravsan B. allegedly accepted a $40,000 contract to assassinate someone in Albania, but the contract slaying failed.