First, the story as reported by our usual sources:
[DW] Two people were killed in a shooting when a man shot up a Mercedes-Benz plant in southwestern Germany. A suspect has been taken into custody, police said.A large-scale emergency operation was underway following a shooting that left two people dead at the Mercedes-Benz plant in Sindelfingen on Thursday morning.
A special operations team sealed off the site with a full-scale deployment including two helicopters and several emergency doctors.
The Public Prosecutor's Office in the nearby city of Stuttgart said it thought a single perpetrator was responsible for the shooting that killed two 44-year-old men.
The shots were believed to have been fired at a production line team leader, with the arrested suspect being a 53-year-old external worker from a logistics firm.
Staff overpowered the suspected perpetrator, detaining him until police arrived, officials said.
WHAT WE KNOW SO FAR
Multiple shots were reportedly fired at about 7:45 a.m. local time (0545 GMT/UTC).
Police tweeted about an hour later that an operation involving police and rescue workers was ongoing on the factory complex, some 15 kilometers (just under 10 miles) southwest of Stuttgart. Authorities confirmed a suspect had been taken into custody.
Emergency services were said to have carried out a search of the building looking for other injured people.
Employees reported that the scene was the automaker's Factory 56, where the firm's flagship S-Class vehicle is produced.
Police are still gathering information, a spokesperson said, and staff are being provided with psychological support.
Mercedes-Benz expressed dismay over the incident. "The tragic news from Sindelfingen has deeply shocked us," a company front man said, adding, "Our thoughts are with the victims, their families and all colleagues on site."
Recent fatal shootings in Germany have sparked a debate over implementing stricter gun laws in the country. The German government said it would revisit firearms laws in the wake of a shooting in March in Hamburg where a gunman killed six people at a Jehovah's Witness hall.
The suspect, a 53-year-old
By the time officers arrived, the suspect had already been overwhelmed by company security. He is being investigated on suspicion of double homicide.
The company said the three people involved were employees of an external service provider. German news agency dpa reported that they worked for logistics company Rhenus.
The sprawling Sindelfingen factory employs around 35,000 workers producing E-Class and S-Class luxury sedans and CLS and GLC coupes, according to Mercedes-Benz's website. It also houses planning, purchasing and development and design departments.
But according to BiaNet, it was political:
A workplace dispute between workers from 
...the decaying remnant of the Ottoman Empire...in a politically tense environment resulted in the killing of two at the Mercedes factory in Stuttgart. One laid off worker shot two team leaders dead. The suspect was taken into custody, and the police started an investigation.
A 53-year-old worker shot two team leaders who he entered into a quarrel with at the Mercedes factory in Sindelfingen, Baden-Wurttemberg in Germany. The suspect was caught shortly after.
While the police have not made any statement about the reason of the killings, the website of the Junge Freiheit newspaper wrote, based on voice messages received from some working at the factory, that the events started with a discussion between two "pro-Erdogan" team leaders at the factory and the suspect who is an Erdogan opponent. When the discussion turned into a fight, the suspect took out his gun and took eight shots at the two.
Yucel Özdemir, a correspondent of Evrensel newspaper, wrote that the events started with M.D. who is known as an opponent, showing a reaction to Özcan K. and Ayhan B. because his labor contract was not extended.