HOUSTON (AP) – A second suspect may emerge in the aftermath of the shooting at a Houston-area community college that left three people injured, the Harris County sheriff said Wednesday.

At least 10 shots were fired Tuesday during a dispute between two men outside the library at the North Harris campus of Lone Star College, Sheriff Adrian Garcia said. Authorities were still looking for the handgun that was used.

Carlton Berry, 22, is charged with two felony counts of aggravated assault with a deadly weapon. Garcia offered no additional details on the role of a possible second suspect. He said investigators were trying to determine what caused the argument, adding that the dispute was “idiocy, stupidity.”