LUBBOCK — An explosion inside a maintenance hole on the Texas Tech University campus in Lubbock set off fires and power outages, leading school officials to issue evacuation orders for several buildings and cancel classes for the rest of the week, university police said.

The explosion came from a manhole on campus near a substation, causing power outages in the area and at the Texas Tech Health Sciences Center, officials said.

A series of fires and a manhole explosion led officials to shut down the campus and send students home early for spring break.