German police on Tuesday detained a second soldier suspected of involvement in a plan by an army officer and a student to carry out an attack, possibly on politicians who do not oppose immigration, the federal public prosecutor said.

Prosecutors believe the three suspects wanted to implicate asylum seekers in their planned attack, in a case that has shocked Germans and stirred a debate about the depth of right-wing radicalism in the country’s military.

The prosecutor’s office named the third suspect in the case as Maximilian T., a 27-year-old German national.

“The accused is strongly suspected of planning a severe act of violence against the state out of a right-wing extremist conviction,” it said in a statement.