A new poll reveals that a majority of Americans are becoming increasingly afraid of ongoing acts of violence committed by homegrown militants.According to a Reuters/Ipsos poll taken during two days following the Boston Marathon bombings on Monday, 56 percent of Americans said that random acts of violence, such as mass shootings committed by Americans, is the biggest threat to public safety in the United States. Moreover, Reuters noted that two-thirds of respondents said they believed an incident like the Boston Marathon attack that killed three people and wounded over 130 others could happen in their area. 32 percent of respondents cited foreign terrorism committed by non-Americans, while 13 percent cited politically or religiously motivated domestic terrorism committed by Americans, as the second and third largest threats to public safety, respectively. Americans were left shaken after a recent series of gruesome attacks including those committed at a Connecticut elementary school, a Colorado movie theater, and a Sikh temple in Wisconsin. On December 14, 20 children and six adults were fatally shot by a gunman -- who later killed himself -- at the Sandy Hook Elementary School in Newtown, Connecticut. On July 20, James Holmes killed 12 people and wounded 70 others after he burst into a sold-out theater in Aurora, Colorado and began shooting people at random. On August 5, one woman and five men were killed and three others were wounded when white supremacist Wade Michael Page opened fire at a Sikh temple in a Milwaukee suburb in Wisconsin.