Updated

The high school where 21 students and a security guard were injured in a stabbing rampage last week will resume classes Wednesday, one week after the attacks.

Franklin Regional School District announced the reopening plans on its website Saturday.

Teachers will return to work Monday and students will be able to visit the school with their families on Tuesday.

Authorities say 16-year-old Alex Hribal attacked his fellow students at the suburban Pittsburgh school with a pair of kitchen knives. He faces four counts of attempted homicide and 21 counts of aggravated assault.

Four students remain hospitalized, all in critical condition. Hospital officials say one wounded student, a 14-year-old boy, was discharged Saturday afternoon.

Police say they don't yet have a motive for the rampage.