An official in southern Sudan says Ugandan soldiers were responsible for a recent attack in the region that left at least one person dead.

The accusation was made by the vice president of semi-autonomous southern Sudan, Riek Machar. He said Ugandan forces must leave the region.

Machar said an investigation shows that Ugandan soldiers were responsible for an attack last month on a homestead in the town of Nyongwa. One person was abducted during that attack and later killed.

Initial reports said rebels of the Ugandan Lord's Resistance Army (LRA) were behind the attack.

There has been no Ugandan government reaction to Machar's accusation. However, a Ugandan army spokesman, Major Paddy Ankunda, is quoted by Bloomberg news service as saying Ugandan forces are in southern Sudan to pursue LRA rebels.

Some information for this report was provided by AFP.