LAS VEGAS, Sept. 9 (UPI) -- Walter Johnson Junior High School in Las Vegas was closed for a second day after hundreds of students were screened for possible mercury contamination.
Some 1,200 students and at least 100 staff members were screened for possible mercury contamination beginning Wednesday. They were kept at the school for about 17 hours Wednesday into early Thursday while being examined for exposure and contamination. Nine students and three staff members were quarantined, but were released by about 5 a.m. Thursday.