article_snippet: A local police officer said most of the injuries were minor but at least two people were in a critical condition .
article_snippet: A local police officer has said 22 people are believed to be injured, but that number is expected to grow.
article_snippet: Nateepat Thammaratsophon said most of the injuries were minor but the train's driver and a mechanic were in a critical condition.
article_snippet: But the driver of one of the trains and a mechanic are believed to be in a critical condition following The accident .
highlights_snippet: The cause is still unknown but at least 22 people were injured in disaster .
  
highlights_snippet: Train driver and a mechanic are in a critical condition, police officer said .
  