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Five officers with the Sunnyvale Department of Safety went to the hospital late Wednesday after they were exposed to a "baggie of narcotics," police said.

Capt. Jim Choi told KTVU that the police department was also on a "Level A" quarantine early Thursday morning as hazmat crews processed the building. The inspection could take several hours.

The quarantine is a result of what happened about 10:30 p.m. on Wednesday, when officers approached a "suspicious person," Choi said. He had a "baggie of narcotics" on him. They arrested him and took his drugs into evidence.

About an hour later, multiple officers were exposed to the unknown substance being processed in the crime lab. One officer suffered the effects of the substance and was having trouble breathing and so he was and was taken to the hospital, Choi said. Four other officers were taken for medical evaluation as a precautionary measure. All five officers wer listed in stable condition.

Dispatchers were moved to a temporary command center.