* Primary source: If you're researching the immediate aftermath of an event, a newspaper report from that time period is a primary source. It offers a contemporary account, potentially including eyewitness testimony and immediate reactions.
* Secondary source: If you're researching a historical event long after it occurred and using the newspaper to analyze the event's long-term impact or using it to understand how the event was portrayed over time, then it's a secondary source. The analysis and interpretation of events become the focus.
Therefore, the classification depends entirely on the context of its use in research.