Spy investigation into the AfD’s Maximilian Krah and his assistant ramps up in Brussels.

Belgian and German police on Tuesday conducted searches at the European Parliament offices of a far-right MEP and his aide as part of an investigation into suspected Chinese espionage.

German authorities said the Federal Prosecutor’s office had requested to search the offices of MEP Maximilian Krah, top candidate for next month’s EU election from the far-right Alternative for Germany party (AfD), and his aide Jian G., who is suspected of “of secret service agent activity.”

German police arrested the aide in April, rocking the AfD while it polls in second place nationally.