One of Hamas members has been killed in an explosion at a house near Gaza City, said the militant group.
The man died while on “a holy mission”, term which is often used when a member dies accidentally, while handling explosives.
The blast at the militant’s home wounded two teenage boys.
Israeli troops have arrested a Hamas member of parliament from the city of Nablus, in the West Bank, said Palestinian. Mona Mansour and 19 other people were detained.
In recent weeks, Nablus has been raided almost daily by Israeli troops, in a crackdown on Hamas.
And several institutions have been closed down across the West Bank, because the were allegedly linked to Hamas.
Since January 2006, when the militant movement won Palestinian legislative elections, dozens of Hamas MPs have been detained by Israel.