Sudan's military said it had arrested senior army officers over a foiled coup attempt, the state news agency said.

The army generals, who ousted longtime leader Omar al-Bashir in April, made the announcement on Wednesday, shortly after reports emerged of high-ranking army officers and radicals being taken into custody in Khartoum.

It was not clear when the coup attempt happened, but the military said it was now uncovering its details.

Earlier this month, the transitional military council said it arrested at least 16 active and retired army officers over a coup attempt.

Late on Wednesday, the military revealed that the country's Chief of the Joint Chiefs of Staff, Gen. Hashem Abdel Muttalib Ahmed, was among those arrested over the attempted coup.

General Abdel Muttalib was appointed chief of staff just days after Bashir's ouster following months of protests.

The army said the coup attempt was also involving leaders of the Islamic Movement and the National Congress Party.

"The failed coup attempt's goal was to abort the people's glorious revolution and to return the former National Congress regime to power, and to disrupt the path before the expected political solution that aims to establish a civilian state," SUNA said.

Sudan's ruling generals and opposition groups have yet to sign the final part of the power-sharing agreement.