DULUTH (AP) — Two small fires burning in the Boundary Waters Canoe Area have prompted the Superior National Forest to close 24 campsites and nine portages.

But all entry points to the wilderness remain open.

The largest fire has burned 15 to 20 acres near the South Arm of Knife Lake, northeast of Ely (EE'-lee) near the U.S.-Canadian border.

A Superior National Forest spokeswoman says planes will drop off 16 firefighters by the end of the day Tuesday to battle the blaze and canoeists should give them a wide berth.

Becca Manlove says it's dangerous for the pilots to abort their takeoffs or landings "just because there's a canoe paddling close to see what's going on."

A second, smaller fire is burning near Sedative Lake.