One of the teenagers accused of carrying out a deadly shooting at a California mosque was flagged by the FBI as a potential threat last year, according to a person familiar with the matter.

Cain Clark, 17, and Caleb Vazquez, 18, killed themselves after opening fire at the Islamic Center of San Diego, authorities said.

Investigators are gathering evidence and working to learn more about the two teenage gunmen responsible for the deadly shooting at an Islamic center in San Diego. So far, they have recovered dozens of guns and a crossbow from two homes they've searched.

Two teenage gunmen carried out a deadly shooting rampage at the Islamic Center of San Diego, killing three men before being found dead from gunshot wounds in a car, and the FBI is investigating their

The two suspects in a shooting at a mosque in San Diego who killed three people praised other religious-inspired shootings in an alleged manifesto, as well as spewing hatred toward Jews, Islam, and women.

A hate crime at the Islamic Center of San Diego killed three people, reminding us that hateful words have devastating consequences.

Two teenage gunmen killed three people at the Islamic Center of San Diego on Monday, raising concerns about increased security at religious centers and the need to address the root causes of gun

Five people are dead, including two suspects and three victims, after gunfire rattled the Islamic Center of San Diego, police Chief Scott Wahl told reporters at a news conference Monday. The three victims in the shooting were adult men,