According to a combination of news from AFP and other foreign news outlets:

Europe's antitrust regulator and Siemens Alstom have reached a stalemate in negotiations.

EU officials said the European Commission is expected to block the merger deal if France's Alstom and Germany's Siemens AG's high-speed train business do not make new concessions to allay their concerns that the deal would weaken competition

Sources said the EU's merger of the rail business of the Siemens and Alstom groups "No more concessions... The wall in front of us is too high."

Alstom also said that the merger plan of the two companies can make the EU executive committee satisfied, "is not certain.

Siemens and Alstom have said they are willing to sell off some of their businesses and offer concessions for other technologies in a bid to ease the commission's concerns that the merged company could dominate Europe's rail signaling and high-speed rail markets.

Siemens, however, has been steadfast in its unwillingness to give up its next-generation high-speed rail technology. Sources within the company said that Siemens did not agree to the Commission's request to license the technology platform for the Velaro system for high-speed rail vehicles.

If the new merged company were to give up Velaro, the sources said, they would be 'completely excluded from European high-speed rail development for up to 10 years'.

And the French and German governments strongly supported the Siemens-Alstom merger. The possibility of the merger going bust may prompt the EU to reassess its competition regulations.