State and federal scientists are trying to identify a mysterious orange substance that washed up on the shore of a village in northwestern Alaska this week.

Residents on Wednesday noticed an orange sheen in the lagoon in front of Kivalina, Alaska, and clumps of the substance on the beach, city manager Janet Mitchell said.

The stuff on the shore had "an oily feel to it, like baby oil," resident Mida Swan said Friday. She said she detected no odor from the substance.

The substance also may have rained down on the village Wednesday evening, because it was found in buckets that some residents used to collect rainwater that night, Mitchell said.

The state Environmental Health Laboratory is preparing to send samples to scientists at various labs, including a National Oceanic and Atmospheric Administration laboratory, said Emanuel Hignutt, the EHL's analytical chemistry manager.

Hignutt said it's not immediately clear what the substance is.

"There doesn't appear to be any evidence of a release of oil or hazardous substances at this time, but we're continuing to investigate and try to get lab determinations on what exactly the material is," Hignutt said.

"What it is - an algal bloom, or something inorganic - that's what we're working to get some more information on," he said.

Mitchell said the substance also was found in the Wulik River, which flows into the lagoon and is a source of the village's drinking water. She said the village would delay topping off its water storage tanks, which it does every summer so that it has enough water for the winter, until the substance is identified.

Kivalina, a village of about 430 people, is about 650 miles northwest of Anchorage, Alaska.