DALLAS, USA: The gunman who opened fire on an Immigration and Customs Enforcement field office in Dallas left behind a collection of notes at his home saying he acted alone in an attack that was intended to terrorize ICE agents and minimize harm to detainees at the facility, officials said on Thursday. Nancy Larson, acting US attorney for the northern district of Texas, said at a news conference that the shooter’s writings were discovered during a search of his home in Fairview, Texas, following Wednesday’s pre-dawn shooting.

The surviving detainees were in critical condition at a hospital, DHS officials said. No ICE agents were injured.

A shooter opened fire at an ICE facility in Dallas on Wednesday, killing one detainee and critically injuring two others.