ST. LOUIS • LYFT expanded to 24 other cities across the nation on Thursday as the ride-sharing app fought back against St. Louis' taxi commission.

"As pioneers of peer-to-peer transportation, we are revolutionizing how people get around and connect with their neighbors," Lyft co-founder John Zimmer wrote to users. "But change raises challenges from those who want to preserve the status quo."

The city's taxi commission—which includes taxi cab company owners and drivers—had successfully argued for a temporary restraining order against the app, citing public safety concerns because the drivers aren't vetted by the commission. Chuck Billings, a lawyer for the commission, told Judge David Dowd that one of the Lyft drivers was arrested over the weekend on an outstanding felony warrant.

St. Louis police said on Thursday that no drivers were arrested, prompting a Lyft spokesman to hit back against the commission.