Two Texas A&M University students are recovering after a small explosion at the Chemistry Annex building.
It happened around 10:45 a.m. in lab 2403 on the fourth floor.
A University spokesperson said graduate students Michael Grubb, of Lantana, and Michelle Warter, of Washington state, were working with dry ice when the glass container over-pressurized and exploded.
A code maroon text message was sent at 10:50 a.m. to around 35,000 students and staff warning them to evacuate the annex and avoid Ross Street.
Other students in the building said they thought the fire alarm was prank.
"There's a lot of confusion during finals and with the alarm (i thought it) just might be someone doing it on purpose or something," said Rodrigo Sanchez-Gonzalez.
The building was evacuated for 30 minutes. Grubb was released from the College Station Medical Center Tuesday afternoon. Warter is being kept overnight.
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