"It 's kind of a chemical-diesel smell," said Sgt. Thomas Hannah.
The trailer has been closed "until further notice," according to a joint statement by Police Commissioner Elton Lewis and MVB Director Lawrence Olive.
Hannah had no firm prediction as to how long the investigation and subsequent cleanup might take. "It may be done by the weekend, or Monday," he said.
There will not be any penalties associated with drivers licenses that have already expired this month, authorities said.
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