The New York Yankees positioned reinforced glass panels in front of the seats where former President Donald Trump was to sit as he attended a game at Yankee Stadium on Thursday night to mark the anniversary of the Sept. 11 terrorist attacks.

Photographs released by the team and obtained by media outlets show a row of three clear glass panels placed in front of the seating area. The Secret Service confirmed heightened security measures for the stadium and said it adjusts its protective posture as required to mitigate evolving threats.

"President Trump receives the highest levels of U.S. Secret Service protection and the agency adjusts our protective posture as needed to mitigate evolving threats," the agency said in a statement shared with The Wall Street Journal. "Individuals in and around Yankees stadium tonight can expect to see increased law enforcement presence. Out of concern for operational security, we cannot discuss the specific means and methods used for our protective operations."

The game, against the Detroit Tigers, was scheduled to begin with a first pitch at 7:05 p.m. local time. The Yankees advised fans to arrive early because of the extra security protocols, and reporters at the stadium described long security lines and fans waiting in extended queues on Thursday afternoon. The team held a minute of silence on Wednesday to honor Charlie Kirk, the conservative activist who was shot and killed while speaking to students at Utah Valley University in Orem, Utah, on Wednesday. Authorities said images of an apparent suspect have been released and the investigation remains ongoing.

The heightened protections and visible barriers come less than 24 hours after Kirk’s assassination, an event that prompted law enforcement agencies and event organizers to reassess security at public gatherings where high-profile figures were expected. Organizers of other major sporting events have previously implemented additional measures at the request of federal authorities. At the U.S. Open men’s final on Sunday, Secret Service protocols contributed to significant entry delays at Arthur Ashe Stadium, prompting an apology from tournament organizers to fans affected by the delays.

The Yankees’ regional cable network, YES, said it had not been instructed to censor audience reactions during the game. Media coverage of past events attended by Trump has shown a mixture of boos and cheers from spectators, and broadcasters sometimes coordinated with event security or hosts to manage live coverage during politically sensitive appearances.

Officials at Yankee Stadium and the Secret Service emphasized that enhanced protective measures are standard procedure when safeguarding former presidents and other high-profile protectees, particularly in the immediate aftermath of violent incidents that could affect threat assessments. The Secret Service statement reiterated that it would not disclose operational details for reasons of security.

Law enforcement at the stadium included an increased uniformed presence and visible perimeter measures. The Yankees and local authorities continued to encourage fans to allow extra time for arrival and to comply with screening procedures. Investigations into the Utah shooting were ongoing, and authorities have asked anyone with information about the suspect to come forward.