Pakistani media say the governor of the country’s central bank, Shahid Kardar, has resigned.

It was unclear exactly when or why Kardar, the governor of the State Bank of Pakistan, stepped down, but media reports said Wednesday he had developed “differences with the government on key policy issues.”

Kardar took office in September 2010, after his predecessor, Syed Salim Raza, resigned in June of that year, citing personal reasons.

According to media reports, the deputy governor, Yaseen Anwar, will serve as acting chief until a new governor is named.

Central bank governors normally serve three-year terms.