WASHINGTON, June 2 (Reuters) – The U.S. State Department said on Thursday that the number of terrorist attacks around the world declined last year for the first time since 2012, and that such attacks were becoming more decentralized and diffuse.

Terrorist attacks fell by 13 percent compared with 2014, while fatalities caused by terrorist activity declined by 14 percent, the agency said in its report on global terrorism, which tracks trends in political violence.

The State Department’s acting coordinator for counterterrorism, Justin Siberell, said the drop was due to fewer attacks in Iraq, Pakistan and Nigeria.

More than 55 percent of attacks attributed to terrorists last year occurred in five countries: Iraq, Pakistan, India, Afghanistan and Nigeria, he said.