JERUSALEM (CNN) -- Israeli settlers on Sunday set Palestinian fields and olive groves on fire after their illegal outpost in the West Bank was dismantled, Israeli military sources told CNN.

Israeli authorities arrested 13 settlers who refused orders to evacuate the Mitzpe Ami outpost near the West Bank settlement of Kedumim, an army spokesman said.

There were no injuries reported in the incident. The outpost is considered illegal under Israeli law.

The incident happened as the top U.S. envoy to the region, George Mitchell, wraps up his visit to the region, part of an effort to restart stalled Israeli-Palestinian peace talks. The United States has pressured Israel to halt settlement construction and dismantle illegal outposts.

Palestinian leaders have said they will not return to negotiations until Israel freezes construction on settlements in the West Bank and stops building in East Jerusalem. The United States has pressured Israel to do that, but the Israeli government has declined, saying instead that it will limit construction in the West Bank and continue to build in East Jerusalem.

Under the 2002 Roadmap for Peace plan brokered by the United States, European Union, the United Nations and Russia, Israel agreed to "dismantle settlement outposts erected since 2001" and "freeze all settlement activity."