Several thousand people demonstrated in Paris on Saturday under the rallying cry "Stop the massacre in Gaza".The left-wing organisers called for France to "demand an immediate ceasefire" between Israel and Hamas militants."I came to support the Palestinian cause, for a ceasefire in Gaza," said engineer Ahlem Triki, a Palestinian flag over her shoulders.Hamas's shock October 7 attack killed about 1,200 people, mostly civilians, in Israel and 239 people taken hostage, according to Israeli officials.