Several German news sites are quoting a DPA report e.g.
aero.de - Luftfahrt-Nachrichten und -Community
Google translation of part of the report:
Saarbrücken - Saarbrücken airline Cirrus Airlines has suspended its operations for economic reasons first. The talks on the future of the company persisted, Managing Director Ingrid Schultheis said on Sunday.
Possibly results would be announced on Monday. The flight operation is limited since Friday evening to set the end of next week, passengers would be rebooked. The approximately 300 employees of Cirrus therefore continue to work at first.