4 residents, 1 firefighter following report of a hazmat incident at Amy Court in North Wales, Montgomery County

NORTH WALES, Pa. (WPVI) — Five people, including a firefighter, were hospitalized after a hazmat incident was reported in Montgomery County on Tuesday.

Emergency responders were called to the Amy Court apartment complex in North Wales, Pennsylvania, because of reports of people beginning to become ill.

Fire officials said a strong chemical odor was detected in the air, which was later identified as ammonia.

According to authorities, it was used as part of a pressure washer cleaning solution.

According to police, the four residents involved in this incident and the firefighter are expected to be OK.