ABIDJAN, Ivory Coast (AP) — Cross-border raids into western Ivory Coast have become more violent and better organized, and could have profound effects on security in the region near Liberia if they continue, a United Nations expert panel warned in a report.

The U.N. experts said the attacks are believed to have been orchestrated by supporters of former Ivory Coast President Laurent Gbagbo, who refused to step down after losing the November 2010 election to now-President Alassane Ouattara. The months-long crisis sparked postelection violence that claimed at least 3,000 lives.