Gaza City has been rocked twice - first by the sound of the missile strike that killed Hamas leader Abdel Aziz al-Rantissi echoing around the streets and then by the outpouring of anger.
Mourners set fire to tyres to honour Mr Rantissi
The BBC's Paul Moss in Gaza City says a seething rage swept through the streets as thousands came out to express their fury at the second targeted killing of a senior Hamas member in less than a month.
Crowds flocked to the hospital where a mortally wounded Mr Rantissi was taken, waving the green flags of Hamas and portraits of the man who had been Gaza chief of the group for a little over three weeks.
"O brigades, take revenge in Tel Aviv," they urged the military wing of Hamas.
Then, as news emerged that Rantissi had died, they marched on his home.
At the scene of the attack, Palestinians swarmed around the wreckage of the white car, pulling out what appeared to be fragments of clothing.
Ismail Haniya, a possible contender for Rantissi's post, told the crowds in Gaza City that Mr Rantissi's blood "will not flow in vain".
Thousands of demonstrators also took to the streets of the West Bank town of Ramallah, where they told shopkeepers to pull down their shutters in a sign of mourning - and set tyres ablaze.
In Tulkarem, Jenin and Nablus, gunmen fired volleys into the
night sky, the AFP news agency reported.
Residents of al-Amari and Qalandiya refugee camps reportedly blocked the road between Ramallah and Jerusalem with burning tyres.