Palestinian protesters and Israeli troops skirmished Friday as hundreds demonstrated against violence by Jewish settlers in the Israeli-occupied West Bank and thousands more against a crippling Israeli blockade in the Hamas-ruled Gaza Strip. In Gaza, mass demonstrations along the perimeter fence with Israel have been a weekly routine over the past 10 months. In the West Bank, where the Palestinian Authority holds limited sway, the protest was sparked by the killing of a Palestinian at al-Mughayyir village last Saturday, which the Palestinians blamed on the settlers. Ashraf al-Kidra, spokesman for the Health Ministry, said 32 Palestinians were wounded by gunfire at several sections along the fence Friday. Earlier on Friday, mediators from Egypt and the United Nations, worried that the border violence could evolve into an all-out conflict between Hamas and Israel, met with leaders of the militant group. Ismail Haniyeh, the militant groups chief, described the meeting as "unprecedented" but did not elaborate. Hamas on Friday accused Israel of not honoring an unofficial truce agreement to gradually ease the blockade and vowed to escalate the protests, which have seen the death of nearly 190 Palestinians since they were launched in the spring. In the village of al-Mughayyir, hundreds of demonstrators waving Palestinian flags rallied, hurling stones at Israeli forces and burning tires. The Israeli army said it responded with "riot dispersal means," referring to tear gas, rubber bullets and stun grenades. The official Palestinian news agency Wafa reported that seven Palestinians were injured. The circumstances that led to the death of Hamdi Naasan, a Palestinian father of four, last Saturday remain in dispute. Palestinians said that Israeli settlers shot and killed Naasan, 38, and settlers contended they fired in the air to chase away attackers after a Jewish man was stabbed. The Israeli police and military have launched investigations. The killing last Saturday was the latest in a wave of settler violence. Attacks by settlers on Palestinians, their property and Israeli security forces increased by 50 percent last year and have threatened to ignite the West Bank, Israeli security officials say. Days earlier, the Israeli authorities charged a 16-year-old yeshiva student from another Jewish settlement with manslaughter and terrorism, accusing him of hurling a four-pound rock that killed Aisha al-Rabi, a Palestinian mother of eight, one night in October as she rode in her family car along a nearby highway. While Palestinian and United Nations officials have condemned the violence — Nickolay E. Mladenov, the United Nations envoy to the Middle East, described the shooting in Al Mughayir as “shocking and unacceptable” — Israel’s right-wing government has remained conspicuously silent, wary of alienating settlers and other potential supporters in an election year.