After the tar balls began washing ashore Wednesday evening, officials shut down Long Beach's coastline from 1st to 72nd places. The bike and walking paths remain open.
The material is similar to what's been found at other area beaches. Tar balls were found at Zuma Beach on Tuesday and South Bay beaches were shut down for the same reason just a week ago.
Long Beach officials are concerned the tar could pose a health risk.
"What we're really looking at is make sure people stay away from that because it can cause a rash, it can make you very uncomfortable," said Kelly Colopy with Long Beach Health and Human Services.
Already, some marine life has been impacted. A brown pelican was found covered in tar.
"There was a sighting of a sea lion that was out on the federal break water. Again, we weren't able to actually capture that animal to assess whether or not he had been contaminated," said Jake Heflin with the Long Beach Fire Department. "There are concerns and considerations that there are impacts on the environment as well as the animals in the water."
It is not known if the tar balls in Long Beach were linked to the oil spill at Refugio State Beach in Santa Barbara County in May. So just where are the tar balls coming from? Tests are being conducted and authorities are hoping to get some answers.
"I can't tell you an exact time right now, but we anticipate sometime in the next 48 hours, we will know where that came from," said Long Beach Fire Department Chief Michael Duree.
Some longtime residents think the tar is just material that normally seeps up from the ocean floor. Still, they don't see harm with authorities being cautious.
"I don't know, just swim at your own risk, I guess. I mean, I wouldn't want to get the stuff in my mouth, that's for sure," said Tim Tavolara, an area resident.
It was not known when the coastline will be back open.