At least four people were shot Sunday morning at a Sikh temple outside of Milwaukee, local media reported.

Witnesses told NBC station WTMJ of Milwaukee that at least one gunman opened fire inside the Sikh Temple of Wisconsin in Oak Creek, south of Milwaukee along Lake Michigan. The shooting happened shortly after 10 a.m., about 90 minutes before Sunday services were to begin.

At least four victims were seen covered on the ground outside the temple. The temple's president was among those shot, the Milwaukee Journal-Sentinel reported.

Sukhwindar Nagr, of Racine, said he called his brother-in-law's phone and a priest at the temple answered, The Associated Press reported. Nagr said the priest told him that his brother-in-law had been shot, along with three priests. Nagr said the priest also said women and children were hiding in closets at the temple.

A temple committee member, Ven Boba Ri, told the Journal-Sentinel that people inside the temple described the shooter was a white male in his 30s.