(CNN)Two Israeli settlers were shot and killed in the West Bank on Sunday, local settler leader Yossi Dagan said, calling it "an extremely serious terrorist attack." The shooting sparked revenge attacks by Israeli settlers against Palestinians, causing at least one death and numerous injuries.
The shooting of the settlers took place in Huwara, south of Nablus in the Israeli-occupied West Bank, just days after a massive Israeli military raid into Nablus in search of wanted militants left at least 11 Palestinians dead.
The settlers killed on Sunday were named as brothers Hillel Menachem Yaniv, 21, and Yagel Yaakov Yaniv, 19, the local settler council said.
"We embrace the family and will be with them as much as necessary," the Shomron (Samaria) Regional Council said. They were from the settlement of Har Bracha, council leader Yossi Dagan said.
Video from the scene showed that their car had crossed a median, and hit a vehicle going the other direction, suggesting they were shot while driving.
The two Israeli men were taken to a hospital after the attack, the Israel Defense Forces (IDF) said, but they later died, the Magen David Adom medical agency said. The IDF added that it was pursuing the attacker.
Another local settler leader said he was present when the two were shot.
"The shooting took place right behind me. It looked terrible -- the shooting was from point blank range," said Shai Alon, the head of Beit El council, adding that Israel needed to "go to war against those who wish us harm."
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Hours after the incident, Israelis killed at least one Palestinian man and injured several others with stones or iron bars in and around Huwara, Palestinian medics and the Ministry of Health said Sunday night.
Sameh Hamdallah Mahmoud Aqtash, 37, was shot in the abdomen and killed in the town of Za'tara, between Huwara and the Israeli settlement of Kfar Tapuach, the ministry said.
In Huwara itself, at least one person was stabbed and another assaulted with an iron bar, the Palestinian Red Crescent said. The emergency service also reported its ambulances were attacked, and said Israeli military forces had prevented three ambulances from entering the town.