DHS Secretary Kristi Noem called the Boulder attack suspect Mohamed Soliman an "illegal alien" and "terrorist."

Federal agents took into custody the family of Mohamed Soliman, the man accused of attempted murder in the fire attack on demonstrators in Boulder, Colorado, Homeland Security Secretary Kristi Noem said in a social media post.

Officials are looking to what the family of suspect Mohamed Sabry Soliman "knew about this heinous attack" on protesters calling for the release of Israeli hostages held in Gaza, Noem said Tuesday.