JERUSALEM — Dozens of radical Jewish settlers, reacting to a rumor that several of their outposts would be dismantled, attacked an Israeli Army base in the West Bank on Tuesday, lighting fires, vandalizing vehicles and throwing stones, hours after another group of settlers occupied a border post with Jordan.

Defense Minister Ehud Barak condemned what he called “a string of violent attacks by criminal groups of extremists,” adding that such “homegrown terror” would not be tolerated. Prime Minister Benjamin Netanyahu called an urgent meeting of defense officials, saying, “We must take care of these rioters with a heavy hand.”

In the past few years, small groups of settlers have pursued a campaign they call “price tag,” attacking Palestinian civilians and property as well as Israeli security forces in retaliation for government policies they oppose. Olive trees have been slashed and burned, mosques vandalized and army property damaged.

In the attack on the base, about 50 settlers used paint, nails and rocks, the military said. Soldiers dispersed the rioters and detained one man. In a separate episode, settlers stopped a car driven by a local Israeli commander and threw a brick at him. He was slightly injured.