Blast in Hamas compound injures children...

Gee, I thought they knew everything there is to know about bomb-making...

A huge blast Wednesday at a Hamas military base in southern Gaza lightly injured more than a dozen people, including children, Hamas officials said. It appeared the explosion was accidental.

Hamas did not say what caused the blast in a crowded neighborhood in the town of Rafah and the Israeli military said it wasn't involved. Israeli warplanes often target Hamas weapons facilities, but Israel usually confirms those attacks.

The Gaza-based Palestinian Center for Human Rights has repeatedly called on Hamas not to store explosive materials in civilian areas. It said a similar explosion in August wounded 58 people and destroyed seven houses.

Explosives stored by Palestinian militants often explode prematurely or detonate while bomb makers are working with them.

Hamas said five children, three women and five other people were all slightly injured by flying glass from the explosion.