The claim specifies a date (April 6, 2026) and details (killing at least 13 people in a city southwest of Tehran) that are only mentioned in the context of the provided web search results, which appear to be reporting on the same alleged event. However, the evidence provided does not contain multiple independent news reports confirming this specific event on this specific date. The evidence is primarily drawn from search results referencing this claim, but without multiple distinct, corroborating reports from different organizations, it cannot be marked as 'corroborated'.

The evidence shows multiple sources referencing the context of US/Israeli strikes and a threat from Trump regarding the Strait of Hormuz. However, no single source explicitly confirms that *neither* Israel nor the U.S. claimed responsibility for the specific strikes mentioned in the claim, nor is there a direct link confirming the sequence of events involving Trump's threat immediately preceding the strikes, other than general mentions of the context.

The evidence mentions strikes targeting Sharif University of Technology (Claim 4 and 5), but none of the provided search results or Wikipedia entries explicitly confirm that an airstrike occurred on April 6, 2026, specifically targeting the university. The context of the strikes is present, but the specific target and date combination is not independently confirmed by multiple sources.

The evidence provided for this claim consists only of general dictionary definitions for the word 'multiple' and does not contain any information regarding sanctions against Sharif University of Technology for collaboration with Iran's military or ballistic missile program. Therefore, the claim cannot be verified or corroborated by the evidence provided.