CHATTANOOGA, Tenn. - Kirk Kelly, the interim superintendent of Hamilton County Schools, says there are six students in intensive care Tuesday morning and six others still hospitalized after a school bus crash in Chattanooga that killed six children.

Chattanooga Mayor Andy Berke says the city is in mourning.

The bus driver, 24-year-old Johnthony Walker, was arrested and has been charged with five counts of vehicular homicide, along with reckless driving and reckless endangerment.

Thirty-five students from kindergarten through fifth grade were on board Monday afternoon when the bus flipped onto its side and wrapped around a tree.