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Rickmers, which manages the ship for Maersk said Iranian navy fired "warning shots" at Marshall Islands-flagged Maersk Tigris.
Los Angeles Mayor Eric Garcetti's office says there are "plenty of trucks and drivers."
Chicago-based SEKO has expanded in recent years into a full-service logistics provider with transportation, warehousing, supply chain, home delivery and e-commerce capabilities.
Together with Dynamex, the two units will offer final mile delivery in more than 70 markets.
Analysts see no let up in rate volatility as big ship deliveries continue.
Port of Dammam terminal operator International Ports Services set a record for the first four months of 2015.