Additionally, Siemens has offered to contribute "significant" parts of its rail systems business to Alstom, helping it to become a "global champion", it added. It also said that any deal would not lead to layoffs for French workers for at least three years. Hollande is set to meet representatives from the company on Monday.
The German government voiced support on Monday for a deal between Siemens and Alstom, according to Reuters, saying it could offer "great opportunities" for both countries.
Reuters added that Hollande was due to meet Siemens CEO Joe Kaeser at 4 p.m. GMT on Monday, to be followed by talks with Martin Bouygues, the chairman of Bouygues, which is Alstom's largest shareholder.
Christian Noyer, the head of the Bank of France, told CNBC on Monday that the rival bids for Alstom were indicative of the difficulties facing French companies.
"The most important lesson to take out of this is that French-based enterprise may not be strong enough, whatever they want to do—engage in partnership, cooperation, or stand-alone. They are weakened by the low levels of their business margins and the insufficient competitiveness of their French activities," Noyer said.
"I think the lesson is clearly that we need to restore the level of margins and the level of competitiveness that we used to have a number of years ago."
Meanwhile, Montebourg has pledged to act in national interests and said on Twitter Monday morning that Alstom should not sell this "national jewel" behind the back of its shareholders, its employees, or the French government.
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"We prefer to emerge stronger from this negotiation to create a global giant made in France," he said on the social media site. "GE behaves very well in France, but its bid poses problems as it stands."
Successive French governments have a long history of blocking foreign takeovers of key domestic companies, claiming that they are off vital strategic importance to the country. Last year, Paris refused to give the go-ahead to Yahoo's takeover of the French video-sharing site Dailymotion, while back in 2005 a potential 30 billion euro bid by Pepsico for food and dairy giant Danone was also halted.