Three high school students were shot Tuesday morning on a street near their school, and one was in critical condition, officials said.

The shootings happened shortly before 8 a.m. near Carl Schurz High School, Chicago Police spokeswoman Patrice Harper said.

The victims are male students — two freshmen and a sophomore, said Chicago Public Schools spokesman Michael Vaughn.

One was shot in the head and was hospitalized in critical condition, said Chicago Fire Department spokesman Larry Langford. The second victim had graze wounds to the head and neck and the third person was shot in the leg.

The identities of the victims were not immediately released. A spokeswoman for Advocate Illinois Masonic Medical Center refused to comment.

No suspects were custody, authorities said.

A woman who answered the telephone at Schurz but declined to give her name said the school was open and the shootings took place at a convenience store across the street.

Police cordoned off a parking lot and convenience store with yellow police tape.