He fired Al Duhail ahead in the 27th minute, but Mali s Cheick Diabate did not let the lead last for long as he drew Farhad Majidi s side level, seven minutes later.
Both teams were set to go into the break on level terms but Abdullah Abdulsalam changed trajectory as he restored Al Duhail s lead in the 43rd minute.
After the restart, Farshid Esmaeili made it 3-3 for the visitors but Olunga s late match-winning goal secured all three points for the Red Knights.
The Kenya international scored his third goal of the night in the 85th minute, courtesy of an assist from Ismaeel Mohammad.
Arsenal, Spurs, Man Utd, Man City, Liverpool and Chelsea have signed up to much-maligned £4.3bn project
A dozen European football clubs have agreed to join a midweek Super League with plans to start in August
Competition would have no relegation, damaging Champions League and mortally wound domestic leagues
Clubs will cream off billions in new TV money and advertising with critics saying they are pursuing NFL model
Boris Johnson has condemned the European Super League as damaging as Tories draw up robust fight back
The PM admitted clubs could be compelled to pay back state-backed coronavirus loans and furlough money
Arsenal, Spurs, Man Utd, Man City, Liverpool and Chelsea have signed up to much-maligned £4.3bn project
A dozen European football clubs have agreed to join a midweek Super League with plans to start in August
Competition would have no relegation, damaging Champions League and mortally wound domestic leagues
Clubs will cream off billions in new TV money and advertising with critics saying they are pursuing NFL model
Boris Johnson has condemned the European Super League as damaging as Tories draw up robust fight back
The PM admitted clubs could be compelled to pay back state-backed coronavirus loans and furlough money
Manchester United chief exec Ed Woodward worked for super league bank JP Morgan dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.
UEFA official slams snake American billionaire team owners for forming new breakaway European Super League as British soccer fans pile on Liverpool s John Henry, Arsenal s Stan Kroenke, and Manchester United s Glazer family for destroying football
A dozen European football clubs have agreed to join a midweek Super League with plans to start in August
The billionaire owners behind the clubs are driving the proposals which have been widely criticized by fans
The ultra-wealthy backers include the US sports moguls behind Manchester United, Liverpool and Arsenal
Fans targeted owners John Henry (Liverpool), Stan Kroenke (Arsenal) and the Glazer s (Manchester United)