What to Know
Mayor Bill de Blasio placed the NYPD on "high alert" and said hundreds of counter-terrorism officers will be out in force.
There is no specific threat against the city, but more than 500 anti-terror cops were posted at sites important to the city's gay community.
A vigil is planned for 7 p.m. Monday at the Stonewall Inn in Greenwich Village. Mourners have been gathering there to pay tribute.
More than 500 anti-terrorism officers were deployed around New York City as a precaution following the deadliest mass shooting in modern U.S. history, while a memorial for victims at the Stonewall Inn in Greenwich Village continued to grow.
Mayor de Blasio said that beefed-up security is being deployed at key New York City institutions representing the gay community, such as the Stonewall Inn, even though there was no credible threat.
"There is no city in the world better prepared to stop terror, to stop hate crimes – you will see the evidence of that in the coming days," de Blasio said.
NYPD Commissioner Bill Bratton said Monday that the department is committed to ensuring that it is there for the city's LGBTQ community.
"We're committed to defending every part of this city, including the community this month that we are celebrating," he said.
The measure comes after gunman Omar Mateen opened fire in to a crowded gay nightclub in Orlando, Florida, killing 49 and wounding 53. Mateen, who was born in New York City, called 911 to express allegiance to the leader of ISIS shortly before the shooting and mentioned the brothers who planted bombs at the 2013 Boston Marathon. He was later killed by police during a standoff at the nightclub.
Law enforcement officials were in Penn Station's Amtrak area with a machine that's used for swabbing bags to check for bomb residue on Monday morning. Transportation Security Administration officials, police and National Guardsmen dressed in fatigues patrolled the station - a fairly familiar sight since 9/11.
At Penn Station on Monday, elevator contractor Rob Penna said it seemed like authorities were overdoing the security. Then again, he added, "I guess it's never enough."
Printing engineer Jose Diza said more security was always better, even though he felt safe.
"I've been coming here for 50 years and never had a problem," he said.
Downtown, heavily armed police officers stood guard outside the Stonewall Inn, the Greenwich Village bar that served as the birthplace for the gay rights movement, ad mourners added to a growing memorial.
A previously scheduled gay pride month event there on Sunday night took on added resonance in the wake of the shooting. Outside the bar, several hundred people packed the street, chanting, "No hate, no hate! More love, more love!" after hearing from a Muslim emigrant from Lebanon who called herself "gender nonconformist."
Candles, rainbow flags, photos and bundles of flowers were placed outside the bar, which activist Andy Humm said is "where we go when things like this happen." Humm is the host of "Gay USA" a news show that airs on public access TV.
Jonathan Foulk, of San Francisco was among the those drawn to Stonewall by the violence in Orlando.
"The thought of someone even planning something like that just breaks my heart," he said Sunday.
Foulk, a development officer for the Trevor Project, which operates a suicide hotline to serve the LGBT community, said he worries about the impact of the shootings on gay youths.
"People will be afraid to be themselves," he said.
A previously scheduled gay pride month event there took on
On Monday evening, de Blasio and Gov. Andrew Cuomo were scheduled to attend a community vigil at the Stonewall Inn.
A Monday night vigil for victims of the shooting was also planned on Long Island.