NEW YORK CITY (WABC) -- The NYPD is increasing security at religious and cultural sites across New York City ahead of planned demonstrations marking the two-year anniversary of the Oct. 7 Hamas attacks in Israel.

Multiple protests and memorial events are planned throughout the day.

Across the city, many are remembering the victims who have died and the hostages still in captivity.

At Columbia University, more than 1,200 empty chairs were set up, each displaying a photo of someone killed.

President Trump said he hopes there will be an agreement on "Phase 1" as early as this week.

Events Marking Oct. 7 in New York City:

Israelis for Peace Memorial Vigil - Union Square

Circle of Unity - Central Park

Flood New York City For Gaza protest - Outside the News Corp. building on Sixth Avenu

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