06/10/2015 02:07 EDT | Updated 06/10/2016 05:59 EDT

Swiss authorities seize evidence from FIFA as part of investigation into World Cups

BERN, Switzerland - The Swiss attorney-general's office says it has seized more evidence from FIFA headquarters for its investigation into the 2018 and 2022 World Cup bidding contests.

The Swiss federal agency says FIFA handed over seized "IT data" to its officials.

The evidence gathering follows two weeks after FIFA's offices were raided for the investigation.

Switzerland's Attorney General Michael Lauber opened criminal proceedings "against persons unknown" two weeks ago in a case probing possible criminal mismanagement and money laundering in the World Cup bid contests won by Russia and Qatar.

FIFA filed the criminal complaint last November.

The Swiss agency says FIFA president Sepp Blatter and Secretary General Jerome Valcke are not suspects in the case.