Chinese investigators say the doctor who reportedly gene-edited two babies acted alone and will be punished for violating the law, state media reports.

Scientists around the world are condemning He Jiankui's research, including his workplace, the Southern University of Science and Technology in China.

A Chinese researcher claims that he helped make the world's first genetically edited babies - twin girls born this month whose DNA he said he altered with a powerful new tool capable of rewriting the very blueprint of life.

For the first time, scientists have altered a faulty gene of a human embryo. But does this open the door to ethical concerns like designer babies?