Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Shooting Attacks Renew Debate Over Domestic Terrorism in US Sirwan Kajjo VOA's Jeff Seldin contributed to this report. WASHINGTON-- One of the two recent mass shootings in El Paso, Texas, and Dayton, Ohio, is being treated as a case of domestic terrorism by U.S. federal authorities. The El Paso attack, which has left 22 people dead, has renewed debate over how to combat domestic terrorism in the United States. The FBI has expressed concerns that such attacks could inspire more homegrown extremists to carry out further violent attacks in the future. "The FBI remains concerned that U.S.-based domestic violent extremists could become inspired by this weekend's attacks and previous high-profile attacks to engage in similar acts of violence," the FBI said in a statement on Sunday. Domestic terrorism on the rise Domestic terrorism "has become increasingly more of a threat with the resurgence of white supremacists groups, as well as some acts from left-wing extremists, though these account for much fewer incidents," said Randall Rogan, a terrorism expert at Wake Forest University in North Carolina. Peter Bergen, a national security expert and vice president at New America, a Washington-based think tank, says that attacks motivated by far-right extremists have increased in recent years. "Right-wing terrorism has been around in the United States for a long time, but what's a little bit different in the last couple of years is that we have seen more mass casualty attacks like we saw in El Paso and Pittsburgh (synagogue shooting in 2018)," he told VOA. According to New America, since the 9/11 terror attacks, terrorists motivated by far-right ideology, including white supremacy, antigovernment and anti-abortion views, have killed 107 people in the U.S. During the same period, 104 people have been killed in the U.S. by homegrown terrorists linked to foreign terror groups, according to the same study. .