French officials said Sunday that 145 people across the country, including 13 in Paris, reported that they had been stabbed with needles at an annual nationwide music festival on Saturday. Twelve people were arrested in connection with the stabbings.

“Some victims were taken to the hospital for toxicological tests,” the ministry said. French officials did not provide any details about the people who were arrested or about what substances the syringes may have contained.

While the number of victims was small compared with the millions of people who attended Fête de la Musique events across France, the reports were among a number of alarming episodes in recent years in which people have reported being injected without their knowledge or consent in crowded spaces like clubs or bars.

A British Parliament report, published in 2022 after a sudden increase in spiking incidents, said there had been more than 1,000 cases of needle attacks in the country between September 2021 and the end of December 2022. The report, which surveyed more than 3,000 victims and witnesses, cited police data showing that about 90 percent of needle spiking incidents occurred during the evening in venues like pubs and nightclubs, though some also happened at festivals and house parties.

The report noted that there was not enough information to determine the overall prevalence of needle spiking and that there could be many more attacks that are not reported.