LEECHBURG, Pa. (AP) — A crash during a motorcycle charity ride in western Pennsylvania sent at least eight riders to hospitals, authorities said.

Officials in Westmoreland County’s Allegheny Township said the crash occurred at about 1 p.m. Saturday on White Cloud Road during the 11th annual Riding For the Cure event to raise funds for research and treatment of breast cancer.

Get daily news, weather, breaking news and alerts straight to your inbox! Sign up for the abc27 newsletters here.

Chief Duane Fisher told KDKA-TV that arriving officers were told that one rider went down after going around a curve and other bikes coming upon the downed motorcycle were caught up in the crash.

Oklahoma-Vandergrift C&S Ambulance supervisor Monica Stringer told the Tribune-Review that four people with serious to critical injuries were flown to Pittsburgh trauma centers and four others with less severe injuries were taken by ambulance to hospitals.

A Riding for the Cure Facebook post said everyone involved had received medical attention and asked readers to “please keep those involved in your thoughts and prayers.”