At least 115 dead harbor seals have washed ashore along the New England coast from Massachusetts to Maine since Sept. 1. According to wildlife officials that's three times what is typical for this time of year.
Maggie Mooney-Seus of the National Oceanic and Atmospheric Administration says biologists are still trying to determine the cause.
"We have ruled out foul play, given the wide area these animals are coming up on the shore. We've also ruled out lack of food or natural mortality, because the animals appear to be relatively healthy," she said.
Necropsies have been performed but the results of tests for toxins or disease but officials won't have the results for two weeks.
This program aired on October 18, 2011. The audio for this program is not available.