Firefighters and paramedics were retrieving a person who was reportedly suffering a life-threatening emergency inside an apartment building on Mason Street in the Tenderloin district shortly after 8 a.m. when they emerged from the building to find their ambulance gone, said Lt. Jonathan Baxter of the San Francisco Fire Department. 

 Woman in stolen SF ambulance crashes on Treasure Island 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Photo: CHP San Francisco Image 1 of / 6 Caption Close Image 1 of 6 A suspect stole an ambulance in San Francisco and crashed on a Treasure Island ramp off of eastbound I-80. A suspect stole an ambulance in San Francisco and crashed on a Treasure Island ramp off of eastbound I-80. Photo: CHP San Francisco Image 2 of 6 A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. Photo: San Francisco Fire Dept. Image 3 of 6 A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. Photo: San Francisco Fire Dept. Image 4 of 6 A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. A stolen ambulance crashed on Treasure Island on Tuesday morning, prompting police to shut down the Interstate 80 eastbound off-ramp on the Bay Bridge. Photo: San Francisco Fire Dept. Image 5 of 6 A stolen San Francisco Fire Department ambulance burns on the Treasure Island eastbound off-ramp after the driver hit a concrete barrier. A stolen San Francisco Fire Department ambulance burns on the Treasure Island eastbound off-ramp after the driver hit a concrete barrier. Photo: California Highway Patrol / California Highway Patrol Image 6 of 6 A suspect in a stolen San Francisco Fire Department ambulance wrecked Tuesday morning on Yerba Buena Island. The rig burst into flames after the driver hit a concrete barrier, officials said. A suspect in a stolen San Francisco Fire Department ambulance wrecked Tuesday morning on Yerba Buena Island. The rig burst into flames after the driver hit a concrete barrier, officials said. Photo: California Highway Patrol / / Woman in stolen SF ambulance crashes on Treasure Island 1 / 6 Back to Gallery 
 
 A woman in a stolen ambulance led San Francisco police on a chase through the city and over the Bay Bridge onto Yerba Buena Island, where the fleeing driver lost control of the emergency vehicle and ended up in a fiery crash Tuesday morning, officials said. 
 
 The California Highway Patrol issued a Sig Alert and closed the Treasure Island eastbound off-ramp, along with two lanes of the Bay Bridge while police and firefighters responded to the chaotic scene that unfolded at the height of the morning commute, causing major delays. 
 
 The woman boosted the San Francisco Fire Department’s Medic 65 around 8 a.m. while paramedics were responding to a minor medical call at 55 Mason Street, firefighters said. 
 
 The paramedics left the ambulance running outside the Ambassador Hotel in the Tenderloin and when they returned with the patient, their emergency vehicle was gone, said Lt. Jonathan Baxter, a Fire Department spokesman. The patient was later treated at a hospital for a minor injury. 
 
 Police used a tracking system inside the vehicle to pinpoint the fleeing driver as she careened through city streets, slamming into several vehicles, said Officer Grace Gatpandan, a San Francisco police spokeswoman. 
 
 Officers caught up to the ambulance and pursued it over the Bay Bridge, where the driver took a sharp left onto the Treasure Island Road exit, where she hit a concrete barrier, police said. 
 
 The woman, who was not immediately identified, got out of the ambulance as it burst into flames around 8:10 a.m. She was not seriously injured and was taken into custody at the scene. 
 
 The San Francisco Fire Department released photos of the burned ambulance after a large plume of smoke was seen billowing from the island. There were no reports of injuries during the episode. The off-ramp onto Treasure Island was reopened around 10:15 a.m. 
 
 Evan Sernoffsky is a San Francisco Chronicle staff writer. Email: esernoffsky@sfchronicle.com Twitter: EvanSernoffsky
– Paramedics leaving a San Francisco apartment building with their patient Tuesday morning were shocked to find their ambulance missing, the San Francisco Chronicle reports. They had left it running when they went inside. Police used a tracking device inside the ambulance to catch up with it a short time later. Authorities say the woman behind the wheel briefly evaded police until crashing into a concrete barrier, according to the Los Angeles Times. The ambulance burst into flames, shutting down the highway. The woman was arrested on suspicion of felony evading police, hit and run, and vehicle theft. The $150,000 ambulance was totaled; the condition of the up to $75,000 worth of equipment inside was unclear. The patient from earlier in the morning found different transportation to the hospital and is expected to be OK. (Cops say a drunk New York college student was arrested for DUI in a stolen ambulance last month.)