Arlington student accused of throwing mustard and bleach mixture on other students

ARLINGTON, Texas - Four Arlington ISD students were taken to the hospital on Wednesday morning after another student threw a water bottle filled with a potentially hazardous substance on them.
What we know:
Arlington police and fire officials confirmed that it happened around 8 a.m. on Wednesday on a bus that was near Arlington High School.
A student allegedly threw a water bottle which contained a strange substance at multiple other students.
Four students who were hit with the substance were taken to the hospital because of eye irritation.
The 14-year-old suspect initially told police the water bottle contained a mixture of water, mustard, and sand. Testing later revealed it also contained bleach.
The 14-year-old is expected to be charged with aggravated assault, police said.

What we don't know:
It’s not clear if the hospitalized students suffered any serious injuries or if they were transported as a precaution.
Arlington ISD has not yet commented on the incident.
The Source: The information in this story comes from the Arlington Fire Department and the Arlington Police Department.