Six people, who were believed to be part of a road construction crew, are presumed dead after Baltimore's Francis Scott Key Bridge collapsed early Tuesday morning. The collapse came after a 984-foot containership DALI  hit the bridge's pillar.

Search operation ends in "heartbreaking conclusion," Maryland governor says (Video)

Maryland Gov. Wes Moore told reporters Tuesday evening it's a "really heartbreaking conclusion to a challenging day."

Late Tuesday, it was discovered that two of the construction workers who went missing after the bridge collapsed were from Guatemala, the country's Ministry of Foreign Affairs said late Tuesday.

Underwater mapping of bridge collapse area to begin Wednesday, Baltimore fire chief said