Authorities are investigating human remains discovered along an Alaska trail less than 2 miles from the home of a missing family of four, including two young children.

The remains might be connected to the disappearance last May of Rebecca Adams, 23; her boyfriend, Brandon Jividen, 38; and her children, Michelle Hundley, 6, and Jaracca Hundley, 3, Kenai police said Sunday.

Police, with help from the FBI, led a massive search when the family went missing, but it failed to uncover any clues.

At the time, relatives said it appeared the family had left without packing. Their two vehicles were parked outside their apartment and their rent for June had not been paid.

A person driving down a west Kenai trail spotted clothing and what appeared to be human remains Saturday, police said in a statement.

Responding officers found remains and items reported missing from the family's home. The four were last seen May 27. The family dog also disappeared.

Police said it would take time to positively identify the remains and complete the investigation.

FBI officials Sunday were traveling to Kenai. The department plans a briefing on the case at noon on Monday.

Kenai is a city of 7,100 about 65 miles southwest of Anchorage at the mouth of the Kenai River, Alaska's most popular sport fishing attraction.