Oman suffered a hammering at the hands of Belarus in today's international friendly at Al Seeb stadium.
The home side fell behind after only five minutes when Alyaksandr Martynovich scored, and the 23-year-old defender added his second goal of the night six minutes later.
Vyacheslav Hleb added the third goal for Belarus after 35 minutes before Vitali Rodionov scored the fourth in the 57th minute.
The defeat was the second at home in a row for Oman who lost 1-0 last month at the hands of Chile.
Oman are preparing for their title defence in the Gulf Cup, having been drawn in Group B along with Bahrain, UAE and Iraq.