LOS ANGELES — A German woman had her right arm bitten off after being attacked by a shark while swimming in Hawaii, authorities said Thursday. The Maui beach in the resort community of Makena was closed on Thursday but was reopened at noon after lifeguards and firefighters surveying the ocean found no sign of sharks in the area, Maui County officials said. The woman, who was about 20 years old, was snorkeling at Palauea Beach when the attack occurred shortly before 5 p.m. Wednesday. The water was choppy and visibility was limited at the time. Bystanders on shore heard the woman scream, put her on a kayak and brought her to land, said Lee Mainaga, fire services chief at the Maui Fire Department. Her right arm was severed below the shoulder, he said. The limb wasn't recovered. The woman was taken to Maui Memorial Medical Center in critical condition. A spokeswoman there said Thursday that the hospital had no further information to release. — Agencies