This is from Debka, which relies on intelligence leaks which go much further than standard news but are obviously not 100% reliable:
Al Qaeda is calling for ?volunteers? to fight with the Palestinians in the Gaza Strip
In statements running all Saturday, Sept 17, over its websites, internet radio and e-mail, al Qaeda told followers: Now is your chance. Hurry up and make your way to the Philadelphi route crossing from Sinai. Contrary to Palestinian claims that the Gazan-Egyptian border is finally closed after six days of uncontrolled mass traffic, DEBKAfile reports thousands continue to stream both ways, together with a steady flow of terrorists and arms from Sinai.