There is no credible or verifiable information supporting the claim that 14 Israeli soldiers were killed by Qassam Brigades in Khan Younis, Gaza. The Qassam Brigades are the military wing of Hamas and have been involved in various conflicts with Israeli forces, but no reliable sources or official reports confirm an incident with such a specific and high casualty figure of Israeli soldiers in Khan Younis. Additionally, the search results provided do not contain any relevant information to substantiate this claim.
Sources: Based on general knowledge and absence of credible reports
