The research team of cloning pioneer Hwang Woo-suk says it has produced nine more stem cell embryo buds.

The team on Sunday showed a photo of an embryo bud at the blastocyst stage from which stem cells can be harvested.

The team will submit research documents to the Seoul National University investigative committee to prove that it has cloning technology.

A researcher said the documents will show the team's successful research up to the stage before the harvest of stem cells.