The zoo said the tiger escaped from its cage for reasons that remain unclear and entered a secure area where the keeper was working.
The forum of relatives of the kidnapped persons had called for rallies and a day of fasting to mark the 500 days under the slogan “Get them out of hell.”
Israel accuses UNRWA, which has supported Palestinians since 1949, of employing staff who participate in terrorist activity.
“This cannot happen soon enough,” she said, speaking on behalf of the UN secretary-general António Guterres on Monday.
Israel captured and later annexed the Arab-dominated eastern part of Jerusalem in 1967.
The attack was said to have been a response to the killing of Hezbollah leader Hassan Nasrallah and others.
Israel claimed that Hamas is still holding 101 people.
Israeli forces have been waging an intense military offensive in the Gaza Strip for seven months.
Four people were killed during Israeli army operations in the West Bank, the Health Ministry in Ramallah said on Wednesday.
The unitary system of government has become a Frankenstein monster that is pushing the country towards the precipice with diminished national and global stature.
