There is no credible evidence that Spain has officially announced it will prosecute Netanyahu and Israeli leaders in its domestic courts for war crimes.
BREAKING: Spain officially announces it will prosecute Netanyahu and Israeli leaders in its domestic courts for committing war crimes.

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Source: dawn.com
Key Evidence
No official statements or credible news reports from reliable sources confirm Spain's intention or action to prosecute Netanyahu or Israeli leaders for war crimes. Existing sources focus on the Gaza conflict and Netanyahu's domestic legal issues unrelated to war crimes prosecution by foreign courts.
What the Evidence Shows
The claim that Spain has officially announced prosecution of Netanyahu and Israeli leaders for war crimes in its domestic courts is not supported by any credible or authoritative sources. The search results and structured sources include updates on the Gaza conflict, humanitarian aid issues, and Netanyahu's legal challenges related to corruption allegations within Israel, but none mention any official Spanish judicial action against Netanyahu or other Israeli leaders for war crimes.
Spain has a history of exercising universal jurisdiction in some cases, but no recent verified announcement or legal proceeding against Netanyahu or Israeli officials has been documented. Therefore, this claim appears to be false based on currently available information.