The official, who spoke on condition of anonymity, said Israel had no new proposals to make, although it was willing to consider a limited truce in which 33 hostages would be released.
"We have stopped playing nice," they said. "Whoever abandons the hostages and our future will be met with significant and fierce non-violent resistance,"The Day After organization added.
The protests took place in various locations in the city. Groups gathered outside the Tel Aviv Museum of Art at Hostages Square and blocked several streets.