An investigative committee on Hwang Woo-suk's stem cell research says it has secured teratoma tissue of stem cells used for his paper published in the journal Science in May.

Grilling members of Hwang's research team for the third day Tuesday, the committee under Seoul National University said it will conduct DNA fingerprint analysis on the tissue in two or three days.

The committee said it obtained the tissues after analyzing research data, documents and testimony from the team over the past two days.