Dodger Stadium’s mass COVID-19 vaccination site was temporarily shut down Saturday afternoon when about 50 protesters gathered at the entrance, frustrating hundreds of motorists who had been waiting in line for hours.

The Los Angeles Fire Department closed the entrance to the stadium — one of the largest vaccination sites in the country — for about an hour starting just before 2 p.m. as a precaution, officials said. Several LAPD officers also responded to the scene; a spokeswoman for the department said no arrests were made.

Andrea Garcia, a spokeswoman for Los Angeles Mayor Eric Garcetti, said that despite the 55-minute interruption, no appointments were canceled.

“We remain committed to vaccinating Angelenos as quickly and safely as possible,” she said.