San Diego police say they have arrested a "shooter" after gunfire was heard near the finish line of the city's Rock 'n' Roll Marathon.
The 'active shooter' incident resulted in a frightening scene for runners and spectators, Fox News reports.
There is "no longer a threat to the community," the San Diego Police Department told Huff Post.
Fox 5 reported that the suspect was a woman and was taken into custody.
The network said she allegedly was firing rounds on a parking lot.
The San Diego Police Department tweeted: "The scene is secure. The Rock and Roll Marathon has resumed."
On Twitter, spectators described hearing at least one shot fired.