The town of Ocean City added an update Wednesday to its official page stating why, as of Wednesday afternoon, the beach remains closed to swimmers.

State and federal officials hope to be able to reopen beaches up and down the Delmarva peninsula to swimming by this weekend, but are still puzzled over the source of medical waste that led to the closures beginning Sunday.

Swimming is still off limits in Ocean City as medical waste, including hypodermic needles, continue to wash ashore. Ocean City Emergency Services Director Joe Theobald said in a statement Monday evening the amount of debris has “significantly decreased,