The police in Whitefish, Mont., said Tuesday that they have stepped up patrols and are working with the F.B.I. after a neo-Nazi and white supremacist website listed the names and contacts of local Jews, calling on readers to “take action” against them.

Lt. Bridger Kelch of the Police Department in the town in northwestern Montana said that the force was taking the measures after the website, The Daily Stormer, on Friday published phone numbers, work locations, email addresses, and photographs of six Flathead County residents. Several of those targeted were from Whitefish where Sherry Spencer, the mother of the white nationalist leader Richard B. Spencer, lives and owns a building that has been the subject of protests.

The matter has been the topic of national news media articles after a local report in The Missoulian drew widespread attention on social media.

Reached by telephone, Lt. Kelch said Tuesday morning that the department was reviewing social media posts and emails directed at the six people, but that none had risen to death threats. He said the department was conducting patrols, but there had been no reported confrontations in person or by telephone. “We have been looking at any communications,” he said.