Welcome to the News Hour. As we come on the air tonight, we're following a developing story out of San Diego, an attack at an Islamic Center.

Police officials say three adult males were killed, including a security guard.

They also say the two teenage suspects believed to be 17 and 19 years old were later found dead, apparently from self-inflicted gunshots.

There was a massive police response this afternoon at the center, located about nine miles north

of downtown San Diego. The site also houses a school, and as a situation unfolded, children

could be seen being escorted to safety. At a press conference this afternoon, San Diego's

police chief thanked law enforcement for

their efforts, especially when it came to those kids.

I cannot express the gratitude, the willingness to step into harm's way.

And I tell you what got me.

Watching the kids come running out.

Just thankful to be alive.

At that same press conference, the center's Imam called this a time of sorrow and a time of sadness.

We have never experienced a tragedy like this before. It is extremely outrageous to target a place of

worship. Our Islamic Center is a place of worship. People come to the Islamic Center to pray, to celebrate, to learn.

Not only Muslims, but we have people from all walks of life.

Officials say they're treating the shooting as a hate crime until proven otherwise.

Today's shooting comes at a time of heightened concerns across a number of religious institutions.

In March, a man attacked a synagogue outside Detroit with a truck

before dying in a confrontation with security guards.