diff --git a/src/com/sk89q/worldedit/bukkit/BukkitUtil.java b/src/com/sk89q/worldedit/bukkit/BukkitUtil.java
new file mode 100644
index 000000000..8e32efa34
--- /dev/null
+++ b/src/com/sk89q/worldedit/bukkit/BukkitUtil.java
@@ -0,0 +1,53 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.bukkit;
+
+import java.util.List;
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.Location;
+import org.bukkit.Server;
+import com.sk89q.worldedit.BlockVector;
+import com.sk89q.worldedit.Vector;
+
+public class BukkitUtil {
+    private BukkitUtil()  {
+    }
+    
+    public static BlockVector toVector(Block block) {
+        return new BlockVector(block.getX(), block.getY(), block.getZ());
+    }
+    
+    public static Vector toVector(Location loc) {
+        return new Vector(loc.getX(), loc.getY(), loc.getZ());
+    }
+    
+    public static Vector toVector(org.bukkit.util.Vector vector) {
+        return new Vector(vector.getX(), vector.getY(), vector.getZ());
+    }
+    
+    public static Player matchSinglePlayer(Server server, String name) {
+        List<Player> players = server.matchPlayer(name);
+        if (players.size() == 0) {
+            return null;
+        }
+        return players.get(0);
+    }
+}
diff --git a/src/com/sk89q/worldedit/bukkit/BukkitWorld.java b/src/com/sk89q/worldedit/bukkit/BukkitWorld.java
index 6dbfa22a5..9c677f245 100644
--- a/src/com/sk89q/worldedit/bukkit/BukkitWorld.java
+++ b/src/com/sk89q/worldedit/bukkit/BukkitWorld.java
@@ -26,6 +26,8 @@ import org.bukkit.block.BlockState;
 import org.bukkit.block.Furnace;
 import org.bukkit.block.MobSpawner;
 import org.bukkit.block.Sign;
+import org.bukkit.entity.Creature;
+import org.bukkit.entity.LivingEntity;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.Location;
@@ -298,13 +300,25 @@ public class BukkitWorld extends LocalWorld {
      * Kill mobs in an area.
      * 
      * @param origin
-     * @param radius
+     * @param radius -1 for all mobs
      * @return
      */
     @Override
     public int killMobs(Vector origin, int radius) {
-        // TODO Auto-generated method stub
-        return 0;
+        int num = 0;
+        double radiusSq = Math.pow(radius, 2);
+        
+        for (LivingEntity ent : world.getLivingEntities()) {
+            if (ent instanceof Creature) {
+                if (radius == -1
+                        || origin.distanceSq(BukkitUtil.toVector(ent.getLocation())) <= radiusSq) {
+                    ent.setHealth(0);
+                    num++;
+                }
+            }
+        }
+        
+        return num;
     }
     
     private Location toLocation(Vector pt) {