(CNN) Tucson Police are asking the public to help identify a man suspected of stealing 29 unused Covid-19 test kits from an Arizona medical center.

The man entered the El Rio Health Center disguised as a delivery driver just before 8 p.m. Friday and allegedly took the test kits while employees prepared to close for the night, the police department said in a Facebook post. Employees noticed the kits were missing on Saturday morning and called police.

Police said the test kits are "essentially useless" to the suspect because they can only be tested in a "private lab equipped with the proper tools for testing and reading results."

Tucson Police said this man is suspected of stealing unused coronavirus test kits.

He is described as a Hispanic man in his 30s, between 5-foot-9-inches and 5-foot-11-inches tall and a large build. The man has a full, dark-colored beard with some graying, and surveillance video shows him leaving in a reddish Dodge Charger or similar style vehicle, police said.

The stolen test kits have already been replaced, police said, so the clinic's testing abilities are not currently impacted. But officials in the hardest-hit states, such as New York and California, have warned about a shortage of tests and testing materials , and their focus has shifted to avoiding broad testing to conserve rapidly dwindling resources.

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