A member of Hamas’s armed wing was killed Saturday and six more Hamas members were wounded in an explosion as they were learning to make bombs, the group said.

The man killed in the blast, Ibrahem al-Ghoul, was reportedly a field commander in Hamas’s Izz ad-Din al-Qassam Brigades.

“The explosion occurred during a training session in bomb-making,” said a statement from the Izz ad-Din al-Qassam Brigades, the military wing of the Islamist Hamas movement that controls Gaza.

The blast took place at a house in the southern town of Rafah, on the Egyptian border.

Earlier, witnesses had said that most of the injured, including two seriously hurt, were “activists.”