We're getting word of a high-speed chase that ended in Dogpatch near 20th and Third Streets. Armed police are now on foot in Potrero. Gunshots have been fired. We'll update as soon as we know more.

UPDATE: According to @ScannerSays, "SFPD units inside the perimeter have one detained, NOT related to the pursuit. Requesting medical attention." Tactical officers now searching the buildings on 25th and Dakota.

UPDATE 5:02 pm: Suspect still at large inside housing complex.