Masked settlers attacked a group of European diplomats during a visit to the occupied West Bank on Saturday, Belgium's foreign minister said, on a second day of high-profile assaults on Palestinians and others during the sensitive olive harvest.

At least four people have been killed and more than 100 injured since the harvest began earlier this month, according to the Palestinian Health Ministry.

Activists say Israeli authorities do little to stop attacks that involve weapons ranging from slingshots to guns.