An unidentified body was found in the L.A. River early this morning in Lincoln Heights.

The body was discovered at 7:25 a.m. on the 1700 block of Spring Street, right under the Spring Street Bridge, according to City News Service.

As of right now, authorities are not sure how the body got there, but City News Service is reporting that witnesses saw someone fall into the river on Saturday, three miles north of where the body was found. Firefighters combed the area for about 40 minutes that day, but found nothing.

The age or gender of the body has not yet been determined, according to the Los Angeles Times. The LAFD is assisting the LAPD with the investigation.

Ed. note: This post has been updated for accuracy. A previous version stated that the body was found under the Broadway Bridge, when it was actually found under the Spring Street Bridge. LAist regrets the error.