Online Radicalization Fuels San Diego Mosque Shooting That Left 3 Dead

Two teens who met online and were radicalized opened fire at a San Diego-area Islamic Center, killing three men (including a security guard) and then dying by suicide; a gardener was shot at but unharmed. Investigators say the attack was driven by hate and extremist beliefs, with a 75-page manifesto and a livestream circulated. Authorities have seized more than 30 guns and other weapons as they probe how the weapons were obtained, while the FBI and San Diego Police interview family and friends and pursue tips. Vigils were held and heightened security at houses of worship is planned as the investigation continues.