Two people sustained injuries after acid was thrown at them in a residential building in the city’s west end, according to Toronto Fire Services.

Fire services said they responded to a call for a hazardous substance shortly after 3:30 p.m., Sunday evening, where they located two victims on Lansdowne Ave. just north of Dupont St., said fire district chief Stephan Powell.

Toronto paramedic services said one person was taken to a local hospital with serious but non life-threatening injuries.

Powell said the circumstances of the incident are still unclear. Police said they are currently investigating.

Police arrested a man on June 9 who allegedly threw a “corrosive substance” at a couple and their infant nearby Christie Pits park on June 7.

“It’s not common in any sense of the word,” said Powell on acid attacks. “Relative to other incidents that happen in the city, it’s very uncommon.”