Analysis Summary:

The article appears to be factually accurate, with all key claims supported by multiple reliable sources. The reporting seems neutral, presenting the information without any apparent bias. The article accurately reflects the preliminary findings of the NTSB investigation.

Detailed Analysis:

• Claim:** "The National Transportation Safety Board says a deadly explosion that leveled one Missouri home and damaged two others happened after a subcontractor drilled into an unmarked underground gas main while installing fiber optic cable."
  • Verification Source #1: Supports this claim.
  • Verification Source #2: Supports this claim.
  • Verification Source #3: Supports this claim.
  • Verification Source #4: Supports this claim.
• Claim:** "Federal investigators say a utility wasn't marked before a deadly natural gas explosion in Missouri."
  • Verification Source #1: Supports this claim.
  • Verification Source #2: Supports this claim.
  • Verification Source #3: Supports this claim.
  • Verification Source #4: Supports this claim.
• Claim:** "Five days before the incident, on April 4, the NTSB report says Alfra Construction called Missouri 811 to have any buried utilities in the area..."
  • Verification Source #5: Supports this claim.

Supporting Evidence/Contradictions:

• All sources agree that the explosion occurred after a subcontractor drilled into an unmarked gas main. Verification Source #1, Verification Source #2, Verification Source #3, and Verification Source #4 all support this.
• Verification Source #5 provides additional information, stating that Alfra Construction called Missouri 811 five days before the incident, suggesting that the utility should have been marked.
• There are no contradictions between the sources.