Grindr disputes the agency's findings.

Affected organizations are cropping up in the Czech Republic and Norway.

The California-based app Grindr is accused of sharing user data without explicit consent.

Norway's allegation against Fancy Bear follows Germany's blaming of the group for a 2015 hack on that country's parliament.

"This is a very serious incident, affecting our most important democratic institution,” Norway's foreign minister said.

National legislatures remain a target for malicious outsiders trying to collect information.