Probably not, despite the fact that two Katyushas launched from Lebanon fell near Kiryat Shmona. So far, the Israeli government is downplaying it as not being the work of Hezbollah. I think that Hezbollah and Iran are preparing for war, but they're not ready yet. They probably want to consolidate things in Gaza and arm Hamas first, so they can attack on two simultaneous fronts.

[Update after noon]

This report from the Jerusalem Post says that there were four rockets.a

Another one? Yummy.