TOLEDO, Ohio — The world’s second-tallest roller coaster won’t open again this year after a person standing in line was hit in the head by a metal object that flew off the ride last weekend at Cedar Point amusement park.

The 420-foot tall Top Thrill Dragster roller coaster will remain closed as officials from the park in Sandusky, ride experts and state authorities investigate, Cedar Point said in a statement.

Park and state officials have released very few details about what happened, saying a female guest waiting to ride the coaster Sunday was struck by a “small metal object” that came off the coaster as it was nearing the end of its run.

The female was treated at a Sandusky hospital before being moved to another facility. Her condition, age and name have not been released.