A 16-year-old Palestinian was killed and 20 others wounded on Saturday during an IDF arrest raid in Nablus, doctors from a local hospital said. IDF sources said that soldiers shot and killed the Palestinian after he threw an explosive device at troops. It was possible, they said, that he was 16. Early Saturday, security forces surrounded a four-story building where the army said two Palestinian fugitives were hiding. Troops called on the fugitives to surrender, and brought in bulldozers that started chipping away at the walls of the building, witnesses said. The fugitives, it turned out, were not in the building, the IDF announced Saturday night. The army said Palestinians fired at the troops and in two cases also hurled explosive devices. Troops fired back, wounding a Palestinian in the lower part of his body, the army said. Majdi Libadi, 34, the owner of the house, said no one fired at the Israeli force, but that dozens of teens threw stones. Meanwhile late Friday night, security forces arrested two Hamas terror suspects in the Gaza Strip. The two were transferred to the Shin Bet (Israel Security Agency) for questioning. Also on Friday IAF fighter jets bombed a weapons storehouse in the Gaza Strip. Palestinian sources said that two people were wounded lightly in the strike.