Israel is claiming that Al-Qa'eda has operatives working in the Gaza Strip. The Prime Minister for the Hamas government there is denying the allegations, and says Israel is making it up so that they have an excuse for attacking.
I'm not sure what to make of this. The US considers Hamas a terrorist organization, but that does not necessarily mean they would get along well with Al-Qa'eda, which has its own agenda. But on the other hand, if Al-Qa'eda offered to help them, perhaps they would agree to it. And yes, it is entirely possible that Israel is looking for an excuse to invade Gaza (again). We'll have to wait and see what happens next.