A lone gunman walked into a midtown Manhattan office building Monday afternoon and opened fire, killing four people – including an NYPD officer – before turning the gun on himself. 

Speaking at a press conference later Monday, NYC Police Commissioner Jessica Tisch identified the shooter as Shane Tamura, a 27-year-old Las Vegas resident with a history of mental health issues. 

Tisch said Tamura had driven across state lines, with his vehicle having been seen as recently as 4:24 p.m. Monday in Columbia, New Jersey, not long before he unleashed a barrage of gunfire. 

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Officers found a rifle case with rounds, a loaded revolver, ammunition and magazines, a backpack, and medication prescribed to Tamura, Tisch said. 

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The vehicle was searched by the NYPD’s bomb squad but found to be clear of any explosives. Police said Tamura is believed to have acted alone and there is no longer a threat to the community. 

"According to our law enforcement partners in Las Vegas, Mr. Tamura, has a documented mental health history," Tisch said. "His motives are still under investigation and we are working to understand why he targeted this particular location." 

The building Tamura entered and opened fire, 345 Park Avenue, is a commercial building where tenants include the NFL, Rudin Management, KPMG and Blackstone. 

Documents obtained by Fox News Digital indicate Tamura had a concealed carry permit that was issued on June 14 and valid for five years. Tamura also carried a private investigator license and had a misdemeanor for trespassing not amounting to burglary in 2023. 

Earlier records show Tamura played football at Granada Hills Charter in Granada Hills, California, which is about 25 miles northwest of Los Angeles. He had also worked as a security guard at a Las Vegas casino per Fox News' Paul Mauro. 

The gunman was armed with a rifle and first opened fire in the lobby of the building on 52nd Street and Park Avenue. He went to another floor and shot people there, sources told Fox News, before going up to the 33rd floor and shooting himself. Police are still searching for a motive in Monday’s deadly shooting. 

Three people are dead, and 10 others wounded after a mass shooting erupted at a popular nightclub in the Turks and Caicos Islands early Sunday morning, an attack officials are calling the first of its kind in the British territory.

The Royal Turks and Caicos Islands Police Force said the shooting occurred just before 3 a.m. on July 27 at the Hookah and Cigar Lounge in Providenciales. According to investigators, at least four suspects were involved in the attack, though no arrests have been made as of Tuesday.

Police Commissioner Fitz Bailey described the incident as "deeply disturbing" in a statement to the Associated Press.

At a press briefing, Premier Charles Washington Misick linked the shooting to gang-related violence and noted that much of the activity appears concentrated in Haitian communities. He urged members of those communities to cooperate with law enforcement and help identify how illegal firearms are entering the country.

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"What we’re witnessing is unprecedented," Misick said. "This level of violence is not something we can allow to become normal. This is not a situation we should accept. It is not a generic situation, and we will do everything possible to stamp it out."

Authorities confirmed that 10 people were transported to the hospital following the attack. Seven remain hospitalized with varying degrees of injury, and one person is in serious condition. Two victims were airlifted overseas for advanced treatment, and the local hospital was placed on lockdown to secure the scene and protect the injured.

In a statement posted to its official Facebook page, the Royal Turks and Caicos Islands Police Force condemned the shooting and urged the public to assist with the investigation.

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"This incident underlines the capacity and willingness of criminals to commit serious acts of violence against our citizens, residents, and visitors," the statement read. "The police force is urging anyone with information to continue to partner with us to bring these criminals to justice."

A reward of $10,000 is being offered for information leading to the arrest of the suspects. Authorities have not yet identified a clear motive.

Premier Misick reassured the public that the government is fully backing law enforcement and emphasized the importance of unity and resolve in the face of such violence.

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"My government is 100% behind the police. It is important that we do everything we can to stem the violence," he said. "At the same time, I want to appeal to the general public not to panic. We must not, as the commissioner said, retreat or cower in the face of those who want to despoil the good reputation of our islands."

The tragedy comes amid renewed efforts by the Turks and Caicos government to combat illegal immigration.

"Let me just cut to the chase," Misick added. "We are now seeing gangland-type slayings. A lot of this gang violence seems to be concentrated in our Haitian communities."

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According to the United Nations humanitarian office, an estimated 10,900 Haitians live in the Turks and Caicos Islands, accounting for roughly one-third of the total population. Approximately 80% live on Providenciales, the territory’s most populous island, but only 20% have permanent residency status.

"Let this be a warning to everyone—those who know something and say nothing, those who are aiding and abetting criminals, and those committing crimes," Misick warned. "This government is committed to ensuring that the Turks and Caicos Islands remain a safe place to live and raise families."