https://avherald.com/h?article=5193184e&opt=0(Not the best audio out of Colorado, but no injuries reported, or cause determined as of yet as to the smoke source)
A Southwest Airlines Boeing 737-700, registration N474WN performing flight WN-1070 from Denver,CO to Tampa,FL (USA), was enroute at FL390 about 170nm southeast of Denver when the crew decided to divert to Colorado Springs,CO (USA), located about 160nm west of their position, after cabin crew reported smell of smoke in the cabin. The aircraft landed safely in Colorado Springs about 55 minutes after departure.
The airline reported cabin crew smelled an odour in the cabin like smoke prompting the diversion. Passengers and crew disembarked safely.
A replacement Boeing 737-700 registration N7831B positioned to Colorado Springs, resumed the flight and reached Tampa with a delay of about 3.5 hours.
https://flightaware.com/live/flight/SWA1070/history/20240528/0105Z/KDEN/KTPA
