Datuk Nazir Razak has questioned why the financial audit of 1Malaysia Development Berhad (1MDB) accounts for the financial year March 31, 2015 has not begun.

"I am perplexed why your March 2015 audit has not even started? How is this allowed?," he wrote on his Instagram.

"Has standards of GLC governance dropped so low?," questioned Nazir who is the younger brother of Prime Minister Datuk Seri Najib Razak.

The last audit was carried out by global auditing firm Deloitte & Co which ended on March 31, 2014.

This is not the first time Nazir had raised questions regarding the 1MDB and its management.

Last month, he had chided the 1MDB top officials, Arul Kanda Kandasamy and former CEO Datuk Shahrul Ibrahim Halmi for their failure to meet the Public Accounts Committee (PAC).

READ: 1MDB: Top officials skipping PAC hearing 'unacceptable' - Nazir Razak

"Your company has triggered a national crisis and you can be too busy to face parliament? Unacceptable," he wrote on his Instagram account, in May.

Shahrul Ibrahim was 1MDB’s first CEO from February 2009 until March 2013, while Arul Kanda was appointed in January this year.

1MDB had been under the spotlight over the last few months after various quarters had alleged mismanagement of funds and poor investments by the government-owned strategic development company.