Several people at a University of Washington residence hall reported feeling sick on Sunday afternoon, prompting a hazmat response.

KING-TV reports ( http://is.gd/rQD1BT) the Seattle Fire Department said some people at McMahon Hall who were being evaluated by medics but were not transported to a hospital.

KIRO-TV reports ( http://is.gd/Lrq3nq) the residence hall was evacuated for about two hours while crews investigated.

Seattle Fire spokesman Kyle Moore says they found no hazardous materials leak and the people who initially said they felt sick later said they felt better.

The cause of why the people were sick is unknown at this time, and the incident is still under investigation.