Harlingen police recovered human remains from the Arroyo waterway on Monday. 

Around 8:30 a.m., police received a call from a concerned citizen regarding possible human remains in the Arroyo. 

The Harlingen Fire Department assisted the Harlingen Police Department in recovering the remains. 

While the remains have not been identified, Haringlen police said they have determined the remains are those of a male.

The case remains under investigation.