Gunman holding two girls at Colorado high school

An adult gunman took at least four people hostage at the high school in the tiny mountain town of Bailey, Colorado today and several shots were reported fired, authorities said.

Hours later, two girls were still being held at the Platte Canyon High School, said Jacki Kelley, spokeswoman for the Jefferson County sheriff.

The gunman had fired at least two shots when he took the six hostage.

Hundreds of students were evacuated in a scene that recalled the horror at Columbine just a short drive away.

There were no reports of injuries. Four hostages were released, but two girls remained inside the Platte Canyon High School more than three hours after the gunman arrived.

Police did not name the gunman or identify the hostages, but said the girls were believed to be unharmed.