A mass shooting at a San Diego Islamic center left multiple worshippers dead after armed teenage suspects, reportedly wearing body armor, attacked the mosque. Law enforcement responded to the scene and took suspects into custody. The attack is among the deadliest at a Muslim house of worship in recent U.S. history.

Federal and local investigators are actively probing whether the suspects were motivated by extremist ideology. Authorities have not yet publicly confirmed a specific motive, but sources familiar with the investigation indicated that potential ties to organized extremist networks or online radicalization are being examined.

The suspects' youth and level of tactical preparation — including the use of body armor — have drawn particular attention from law enforcement officials. Investigators are working to determine how the teenagers obtained their weapons and equipment, and whether others may have assisted in planning the attack.

The shooting has intensified an ongoing national conversation about the safety of Muslim communities in the United States. Advocacy groups and religious leaders have called for increased security at houses of worship and pointed to what they describe as a broader climate of hostility toward Muslim Americans. Vigils and solidarity gatherings were organized in San Diego and other cities in the wake of the attack.

President and federal officials issued statements condemning the attack. The Council on American-Islamic Relations and other civil rights organizations have called for the incident to be investigated and prosecuted as a hate crime. No formal hate crime charges had been publicly announced as of May 20.