(CNN) -- Four people were injured when an experimental rocket exploded at the University of Idaho on Thursday night, school officials said.

The victims were testing the rocket in a parking lot next to the school's steam plant, when it apparently malfunctioned, said Jodi Walker, a campus spokeswoman.

They were transported to a local hospital with undisclosed injuries. They "were alert and communicating" with the university's staff, according to a statement released by the university.

There is no danger to the campus at this time, Walker said.