Multiple people were killed and injured in a shooting at the Santa Clara Valley Transportation Authority (VTA) control center in San Jose, California, according to the Santa Clara County Sheriff's Office.
The number of casualties was not immediately clear, but VTA employees are among the victims, sheriff's spokesperson Russell Davis said.
The suspect, a male, is also dead, Davis said.
The shooting was reported around 6:30 a.m. local time at a VTA hub where maintenance is conducted and trains are stored.
The facility was evacuated, San Jose Mayor Sam Liccardo said. VTA said service wasn't impacted.
"Our heart pains for the families and the coworkers," Liccardo said at a news conference.
VTA Board of Directors chairperson Glenn Hendricks called the shooting a "horrible tragedy."
"We're so sorry this event happened," Hendricks said at a news conference. "We will do everything we can to help people get through this."
Attorney General Merrick Garland has been briefed on the shooting, Justice Department spokesperson Anthony Coley told ABC News.
Hendricks said light rail service will be suspended at 12 p.m. local time.
"We will have bus bridges in place to provide limited service while we work through this," VTA tweeted. "The light rail yard remains an active investigation scene, limiting our ability to provide service."
Source: ABC New