UPDATE: MU researchers allowed to re-enter Schweitzer Hall after Monday explosion

Tuesday, June 29, 2010 | 6:42 p.m. CDT; updated 9:28 p.m. CDT, Tuesday, June 29, 2010

COLUMBIA — After the Monday explosion of lab equipment in MU's Schweitzer Hall, the Columbia Fire Department and MU News Bureau are not releasing the names of the four victims, one of whom sustained injuries previously listed as life threatening.