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Two people were taken to the hospital Tuesday after a chemical spill at a Waltham lab, officials said.

Police and firefighters rushed to 35 Gatehouse Drive after a minor release of hydrofluoric acid in one of the labs in the building around 9:53 a.m. The building is mostly occupied by Astrazeneca Pharmaceuticals, Waltham Fire Lieutenant Scott Perry said, but he wasn’t sure who owned the lab where the spill happened.

A state hazardous materials response team and firefighters cleared the scene and deemed the building safe by 1:57 p.m., Perry said.

Perry said officials don’t believe there was anything suspicious about the incident.

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Perry said firefighters did not need to use protective masks but were prepared for a dangerous situation because of the nature of the spill.

“This is what firefighters do. We train for the worst and hope for the best,” Perry said.


Sabrina Schnur can be reached at sabrina.schnur@globe.com. Follow her on Twitter @sabrina_schnur.