Five Palestinians were killed at the Israel-Gaza border by an explosive device that appeared to have been detonated accidentally, Palestinian officials said, as protests along the volatile frontier have ticked up after months of relative quiet, writes Reuters.

Dozens of Gaza youth held a protest along the border in support of Palestinians jailed in Israel. An umbrella group of Palestinian factions said the explosion was caused by a device some of the protesters had planned to use during the rally.

The Israeli military said in a statement that the protesters had tried to throw it at its soldiers across the border. The Palestinian Health Ministry said five people had been killed.