Italian prosecutors and the Nigerian state are appealing against Shell's acquittal in a major corruption case.

The oil and gas group confirms this after reporting by Reuters.

An appeal is also being lodged against Eni's acquittal.

Shell, along with its Italian counterpart Eni, was accused of paying bribes when the two groups were given the right to exploit Nigeria's OPL 245 oil field.

The companies paid 1.3 billion euros for those rights.

According to prosecutors, just under 1.1 billion euros of that amount was channeled to politicians and intermediaries, but the Italian judge found that there was no evidence for this.

Former and current directors of Shell and Eni were also acquitted.

Prosecutors had demanded fines of €90,000 per company and eight years in prison for the directors.

Shell is confident in the outcome of an appeal, a spokesperson said in writing.

"We have always maintained that the agreement was legal in 2011 and we are pleased that the court ruled that there was no case against Shell and its former employees," the Dutch-British group said.

"Acting with integrity is fundamental to our values."

Shell announced its second quarter results on Thursday. The company posted a profit of $3.4 billion, compared to a loss of $18 billion in the same period last year.