A hornet attack leaves four people in critical condition in central China's Hubei province Sunday.
They were watching a fireworks show Saturday night when the hornets started stinging. Panic then caused spectators to run.
A total of 21 people were injured by hornets; six others were injured in the stampede.
The four people in critical condition were suffering from acute kidney inflammations.
Vice Mayor of Yichang, Liu Jungang, requested the hospital spare no effort to save the lives of the victims.
Thousands of people were on the bank of the Yangtze River to celebrate a tourism festival being held by the Yichang government.