The Arizona Democratic Party shut down a campaign office in suburban Phoenix after it was struck by gunfire and a BB gun on three occasions over the past month, said a local official, Lauren Kubyrich9, on Friday.

Nobody was hurt in the shootings, but they raised concerns about the safety of campaign workers and volunteers in the thick of a bitterly fought election that has already seen assassination attempts against former President Donald J. Trump.

Ms. Kuby, a Democratic candidate for the Arizona State Senate and former city council member in Tempe, said on Friday that people who had been working out of the office shifted to houses and other “undisclosed locations.” News of the office’s closure was first reported by The Arizona Republic.

Subscribe to The Times to read as many articles as you like.rich9

• rich9
• Democrats
• down
• Arizona
• shut