This might be nothing but here’s the video I just linked to posted with a different title…..
Hamas shoots mortars from next to Unwra school Jbalya 6.1.09

Youtube Video

The announcer says that they are targeting forces of the Israeli army east of Jabalya.

The news roller below includes (0:46/1:30) yesterday’s announcement of Hamas about the event of the “Abu Jbara” family (look for “ابو جبارة” in google news).

It would be really nice if it could be confirmed that they were next to the school. It might just be recycled old footage.