German police said on Tuesday they have arrested a 20-year-old suspect in the case of private data stolen from hundreds of politicians, including Chancellor Angela Merkel, and published online.

“The prosecutor’s office in Frankfurt, the Central Office for Fighting Internet and Computer Crime and the Federal Police Office searched the apartment of a 20-year-old suspect on January 6 and took him into custody,” the BKA said in a statement.

It announced a press conference at midday to give further details on the probe into the remarkable breach of cybersecurity, which has piled political pressure on the government.