Overview

• A vehicle struck an unidentified pedestrian at 5:14 a.m. Tuesday at Tenth and Harrison streets near the South of Market Costco, officials said.
• Firefighters arrived within minutes and officers rendered aid until paramedics transported the victim to a trauma center with life-threatening injuries.
• The driver remained at the scene and is cooperating with San Francisco Police Department investigators probing the cause of the crash.
• Emergency management officials have shut Tenth Street from Howard to Bryant and adjacent Ninth and Eleventh streets to secure the area and preserve evidence.
• Authorities have urged motorists to avoid the South of Market neighborhood and use alternative routes due to the ongoing closures.