NEW : As things stand , they contend , doing nothing is not a valid option . Hamas security sources : Islamic Jihad militants killed in Israeli airstrike . At least 100 Palestinians have been killed in Gaza since Monday , officials say . Score: 6 Israel says all options remain on the table , says that Hamas must stop attacking Israel .
NEW : Hamas security sources : Islamic Jihad militants killed in Israeli airstrike . At least 100 Palestinians have been killed in Gaza since Monday , officials say . Score: 6 Israel says all options remain on the table , says that Hamas must stop attacking Israel .