Twenty-year-old Tampa, Florida, native Sayfollah Musallet's family is calling the incident an “unimaginable nightmare."

Sayfollah Musallet, 20, was killed in village of Sinjil near the city of Ramallah Friday, according to the Palestinian Health Ministry.

Israeli strikes in the Gaza Strip killed at least 30 people on Sunday, pushing the Palestinian death toll past 58,000 after 21 months of war.

Florida-born Sayfollah Musallet, 20, was beaten to death while visiting family in the West Bank. A second man was found dead with a gunshot wound.

The family of a young Palestinian-American killed by Israeli settlers in the occupied West Bank is urging Washington to launch an independent probe into what rights groups call a brazen, unpunished act of violence.

Frustration among Palestinians escalated following the funeral of two men, one a U.S. citizen, killed by settlers in the West Bank. The victims' families demand stronger U.S. intervention. Despite many in Al-Mazr'a Ash-Sharqiya having American ties,