Severe weather in France led authorities to shut the tunnel under the English Channel, but not before four Eurostar trains got stuck inside, leaving hundreds of people stranded. The four Eurostar trains were all traveling to London when they got stuck in the tunnel, Eurotunnel spokesman John Keefe told CNN. Three were traveling from Paris, France, and one was going from Brussels, Belgium, he said. One of the trains was towed to London"s St. Pancras station and plans were being made to tow another to France, he said. The passengers on the other two trains, carrying 700 and 664 people respectively, were being evacuated, he said. It was not known how many passengers were on the trains being towed. It was also not clear why the trains broke down, but there was severe winter weather on the French side of the tunnel. "The weather conditions (in France) are still very bad," Keefe said. "Heavy snow, deep snow now, and very, very difficult access to the motorways. We"re working with the French authorities, who are advising us as to what they think the motorways can cope with." French authorities have told all trucks to get off the highways on the French side of the Channel because the weather conditions are so bad, Keefe said. Eurotunnel operates the Channel Tunnel, also known as the Chunnel, between Britain and France.