大都会警察局（Metropolitan Police Department）表示，周四，一名枪手在华盛顿特区的一家健身房内开枪，造成一人死亡，四人受伤。
大都会警察局（Metropolitan Police Department）临时警长杰弗里·w·卡罗尔（Jeffery W． Carroll）在新闻发布会上说，他随后逃到健身房楼上的公寓，在阳台上向更多人开枪，然后开枪自杀。
官员们表示，其中一名伤者伤势严重，枪手在自己的公寓内自我封闭后死于枪伤。
警方确认嫌疑人为55岁的马特·韦德·兰伯特，他住在健身房所在的同一栋楼里。
官员称，兰伯特在体育馆内开枪打死了公寓大楼的经理，46岁的詹姆斯·斯图尔特。
当被问及动机时，卡罗尔说“还很早”，但他们认为“与公寓楼有某种冲突。”
当局表示，他们知道“本案中的嫌疑人和大楼公寓业主协会管理层之间关于维护问题、霉菌等问题的持续纠纷。”
卡罗尔补充说，他们“不知道其他四名受害者和嫌疑人之间是否有关系。”
与嫌疑人交谈的谈判人员提到，“大部分谈话都是关于房主协会及其挑战，”当局说。
官员们说，兰伯特一度在大楼内点燃了一把火，但很快就被扑灭了。
官员们说，兰伯特有三支枪和易燃物，这表明周四的袭击之前有一定程度的计划。
官员们说，在他设置路障之前，事件持续了大约五分钟。
官员们在新闻发布会上说，当局表示，警察在与嫌疑人沟通时听到了一声枪响，并强行进入公寓，发现被设置路障的嫌疑人似乎是自残的枪伤。
嫌疑人的社交媒体踪迹
嫌疑枪手似乎自2025年9月以来一直在社交媒体平台X上运营一个账户，专注于他的住房问题。
在几篇帖子中，他似乎提到了警方称兰伯特开枪打死的大楼管理员。这些帖子包括许多照片和视频，他说这些照片和视频显示了他的单元中的水损坏和霉菌，以及他试图向他的大楼管理人员寻求补救。
5月19日，他写道，“今天在健身房见到了我的大楼管理员，他声称对审计一无所知。”
10月1日，他似乎提到了Luigi Mangione，写下了他正在进行的诉讼，“经过HOA几个月的‘Luigi’战术（拖延、否认、辩护），我们终于能够提交一份独立的工程报告进入记录。
1 dead， 4 injured， in Washington， DC， after shooting
One person is dead， and four people have been injured after a gunman opened fire inside a Washington， D．C．， gym on Thursday， the Metropolitan Police Department said．
He then fled to his apartment above the gym， where he fired at more people from his balcony before turning a gun on himself， Interim Chief of Police for the Metropolitan Police Department Jeffery W． Carroll said at a press conference．
Officials said one of the injured was critically wounded and the shooter died following a self-inflicted gunshot wound after barricading himself inside his apartment．
Police identified the suspect as 55-year-old Matt Wade Lambert， who lived in the same building where the gym was located．
Officials said Lambert shot and killed the apartment building＇s manager， 46-year-old James Stewart， inside the gym．
Carroll said the other people shot， two women and two men， were transported for treatment． One of those injured is in critical condition．
Asked about the motive， Carroll said it was ＂very early，＂ but they believe there was ＂some sort of a conflict with the apartment building．＂
Authorities said they were aware of an ＂ongoing dispute between the suspect in this case and the building condo home owner＇s association management regarding maintenance issues， mold and the like．＂
Carroll added they ＂don＇t know if there is a relationship between those other four victims and the suspect．＂
Negotiators who spoke with the suspect mentioned that ＂most of the conversation was about the homeowner＇s association and challenges with that，＂ authorities said．
Officials said Lambert ignited a fire inside the building at one point， but it was quickly put out．
Officials said Lambert had three firearms and flammables， which suggests there was some level of planning before Thursday＇s attack．
Before he barricaded himself， officials said the incident lasted around five minutes．
Authorities said officers heard a gunshot while communicating with the suspect and forced entry to the apartment， finding the barricaded suspect with what appears to be a self-inflicted gunshot wound， officials said at the press conference．
The shooting started at the VIDA gym near Logan Circle， police said．
＂We are writing to inform you that VIDA Logan Circle is temporarily closed following a shooting that occurred earlier today，＂ the gym wrote in an email to members on Thursday．
Suspect＇s social media trail
The suspected gunman appears to have operated an account on the social media platform X since September 2025 focused on his housing issues．
In several posts he appears to mention the building manager that police say Lambert fatally shot． The posts include numerous photos and videos that he says show water damage and mold in his unit， and his attempts to seek redress with his building＇s management．
On May 19， he wrote， ＂Saw my building manager at the gym today and he stated no knowledge of the audit．＂
On Oct． 1， he appeared to reference Luigi Mangione， writing about his ongoing lawsuit， ＂After months of ＂Luigi＂ tactics （delay， deny， defend） by the HOA， we were finally able to submit an independent engineering report into the record．
A post referencing that report appeared on the account at 8：07 am on the morning of the shooting．
