The FBI says a confessed Alaska serial killer who targeted people across the country told authorities he planned to strike again in the state if he had gotten away with the murder of an 18-year-old Anchorage barista.

FBI spokesman Eric Gonzalez says 34-year-old Israel Keyes prepared a body disposal cache for a future target. Murder kits also have been recovered in New York and Vermont.

Authorities have recovered the cache containing a shovel and two large bottles of Drano from Eagle River north of Anchorage. Gonzalez says the drain de-clogger would speed up decomposition of a body.

Before killing himself in his Anchorage jail cell, Keyes told authorities he killed barista Samantha Koenig and at least seven others over the past decade, including Bill and Lorraine Currier of Essex, Vt.