Idaho, Aug. 2 -- Three individuals were killed, and seven others suffered injuries after a gunman opened fire at an In-N-Out eatery in Twin Falls, in the US state of Idaho, on Saturday before taking his own life, local officials confirmed, according to CBS News.

Twin Falls Police Chief Matthew Hicks stated on Sunday that the shooter died from a self-inflicted gunshot wound, identifying the perpetrator as 24-year-old Chad Williams.

Hicks noted that investigators are attempting to establish the motive behind the attack, adding that the suspect's relatives are assisting law enforcement officers with the ongoing inquiry.

"Their hearts are also broken," Hicks said.

The incident occurred shortly before 2:30 pm local time, with video footage...