ANCHORAGE, Alaska – Crews aboard two aircraft flew over an oil drilling ship Tuesday that went aground in a severe Alaska storm and saw no sign that the vessel was leaking fuel or that its hull had been breached.

The Royal Dutch Shell drilling rig used this summer in the Arctic was aground off a small island near Kodiak Island, where the ship, the Kulluk, appeared stable, said federal on-scene response coordinator Capt. Paul Mehler.

“There is no sign of a release of any product,” Mehler said during a news conference at unified command center at an Anchorage hotel.