(CNN) -- An explosion caused by a chemical reaction at a University of Maryland-College Park chemistry lab caused minor injuries to two students and forced authorities to evacuate the four-story building, according to the Prince George's Fire Department. 

Initial reports described an explosion and fire inside the building, but fire department spokesman Mark Brady said in a post to the department's Twitter account that there was no fire. The department's hazardous materials team was preparing to go into the building, he said. 

Two students were being treated at the scene for first-degree chemical burns and superficial cuts, Brady said on the social networking service.
What caused the injury? where was the incident? how many were evacuated? what injured the students Which building was evacuated? what did the authorities evacuate What is the name of the University? how many students were injured
explosion
University of Maryland-College Park chemistry
four-story building,
explosion caused by a chemical reaction
lab
University of Maryland-College Park chemistry
of Maryland-College Park
two
Chemical reaction injures two University of Maryland-College park students .
Authorities evacuated the chemistry building, a fire department spokesman says .