Rust-colored oil washed ashore on barrier islands off Alabama and Mississippi on Tuesday, while more patches of crude offshore appeared to be moving toward those states’ coasts, authorities reported.

Researchers scrambled to clean up tar balls and puddles of oil from the beaches of Alabama’s Dauphin Island, while a strip of oil about two miles long and three feet wide stretched along Petit Bois Island, about five miles away off Mississippi, Gov. Haley Barbour’s office reported.

It marked the first time oil has hit Mississippi’s shores since the largest oil spill in U.S. history erupted in late April. And while tar balls associated with the Gulf spill had hit Dauphin Island, about 35 miles south of Mobile, in early May, residents said that Tuesday was the first time they had seen oil hitting the beach.

(Source: CNN)