WATCH: Trump addresses deadly attacks in Syria, Australia and Rhode Island at Christmas reception

President Donald Trump commented Sunday on the deadly shootings in Australia, Syria and Brown University in Providence, Rhode Island.

Watch Trump’s remarks in the video player above.

As he arrived at the White House’s Christmas reception, Trump paid tribute to those killed and injured in the three attacks.

He first offered his condolences to the families of the two people killed in the Brown University shooting, before going on to honor those who died in Australia and Syria.

LIVE UPDATES: Deadly shooting at Brown University

“To the nine injured, get well fast, and to the families of those two that are no longer with us, I pay my deepest regards and respects,” Trump said in reference to the Brown University shooting.

A person of interest was in custody Sunday after the shooting during final exams at Brown University Saturday.

On the mass shooting in Sydney, Australia, Trump called it a terrible “anti-Semitic attack.”

At least 11 people were killed Sunday in the attack on a Hannukah celebration at Sydney’s famous Bondi beach. At least 29 were injured.

“We had an attack in Syria and we had three great patriots terminated by bad people, and not the Syrian government, it was ISIS. The Syrian government fought by our side,” said Trump of the Syria incident.

The man who carried out an attack in Syria that killed three U.S. citizens had joined Syria’s internal security forces as a base security guard two months earlier and was recently reassigned amid suspicions that he might be affiliated with the Islamic State group, a Syrian official told The Associated Press Sunday.