Ulm police tweeted Wednesday they'd investigated a suspect package but it turned out to be a normal delivery.
Germany has been on edge after authorities last week said they were investigating a plot to extort money from DHL.
That announcement came after a package sent to a pharmacy in Potsdam containing wires, batteries and nails to resemble a bomb prompted the evacuation of a Christmas market on the same street.
The package contained a link to an online message threatening to send more packages unless DHL paid millions of euros (dollars).
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