A 19-year-old woman was sexually assaulted at gunpoint while jogging at a park Tuesday morning in Montgomery County, authorities said.

The attack occurred about 10:50 a.m. at Norristown Farm Park in East and West Norriton Townships. The woman called 911, and police from both townships and detectives from Montgomery County responded. The woman was taken to Einstein Medical Center for medical treatment.

The park, which was closed after the attack, reopened Wedesday morning.

The suspect was described as a black male wearing a black ski mask and/or a dark hooded sweatshirt. Anyone with information helpful to the investigation can call East Norriton police at 610-272-0748, West Norriton police at 610-630-1701, or Montgomery County detectives at 610-278-3368.