A source close to the matter noted that senior officials in the Biden administration had talked to Palestinian Authority Minister of Civil Affairs Hussein a-Sheikh several times, asking the PA official to agree to a joint Israel-PA investigation. 

According to US sources A-Sheikh is giving them “the run around".

Breaking: Palestinian Authority Minister of Civil Affairs Hussein a-Sheikh confirms that the PA refused Israel's request to conduct a joint investigation into the death of Sheerin Abu Aqla. He claims that the PA will conduct an ointment investigation and update Qatar, the US and other relevant parties on its results.

Source: Barak Ravid - Twitter