Good evening. I'm John Yang. Tonight, two communities, half a world apart, are struggling with the aftermath of a mass shooting.

In Sydney, two gunmen killed at least 15 people celebrating Hanukkah on Australia's most famous beach.

Authorities call it a terrorist attack on Jewish Australians.

And we begin in Providence, Rhode Island,

where two Brown University students were killed and nine others wounded

when a man opened fire in a classroom where a review session

for an economics exam was going on.

Authorities say a person of interest, described as a man in his 20s,

was taken into custody at a hotel about 20 miles from Providence.

Today, police patrolled the streets around the Brown University campus as snow fell.

It was a stark contrast to last night when police responded in force to reports of an active shooter.

They searched the campus for a suspect.

Students were told to shelter in place.

For some, that met a classroom. Others were escorted to an athletic center. Engineering student,

Chiang Heng Chen, was working in a lab when the alert went out.

We decided to close all the doors and turn all the lights up and hide under the desks and wait for the next

notification. Another witness described the scene last night. Someone was getting CPR. I've seen a few

people getting carried out on stretchers. Video from surveillance cameras show a figure coming out

of the building where the shooting took place. Police won't say if it led them to the man they

took into custody.

This morning, Providence Mayor Brett Smiley reflected on this difficult time.

We knew it could happen anywhere, including here, but that's not the same as it happening in our

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