Upper Dublin HS Locked Down Wednesday Morning

UPPER DUBLIN, PA — Upper Dublin High School was locked down on Wednesday morning, school officials announced. The cause of the lockdown is not yet clear.

The school said that all staff and students are remaining in their first period classes.

Principal Bob Schultz said at around 9:30 a.m. that the school is taking "abundant caution."

"We will provide additional information shortly and expect a quick return to normal activity," Schultz added.

This is a breaking story. More information will be provided as it becomes available.