OSLO, March 21 (Reuters) - A Norwegian appeals court put on hold an injunction that could have halted the development of two oilfields operated by Aker BP, environmental group Greenpeace said on Thursday, in a win for the government and energy companies.

In January, a lower court had granted a surprise victory to environmentalists by invalidating the approvals of two offshore projects, Yggdrasil and Tyrving, in addition to Equinor's Breidablikk, due to an insufficient assessment of their environmental impact by authorities. (Reporting by Nerijus Adomaitis, editing by Gwladys Fouche and Terje Solsvik)