pPlease cCheck tThese sSentences, t. Thanks

I don't know if anyone has been injured inbecause of the accident.

I don't know if anyone was injured in the accident.

I don't know if anyone has been injured in the accident.

I would either use the sentence above or change it to “I didn’t know if anyone had been injured in the accident.” That makes the verb tenses consistent. The first example was present + simple past, and this would be simple past + past perfect.