APR, three-time winners of the zonal championship have themselves to blame for their below par defensive discipline that saw concede three goals inside 40 minutes.
A mix-up in the APR defense led to goalkeeper Jean Claude Ndoli's failure to deal with a short cross from Cameroonian Baba Ousmaila in the opening minutes.
Ten minutes later, Ndoli rushed off his line, leaving Amin Ibrahim with an empty net and the Khartoum number eight (8) made no mistake from close range.
APR tried their best to get back into the game, but organization in the Khartoum backline didn’t give them much freedom upfront.
Amin scored the third goal five minutes from the break to take the game beyond APR, who failed to put their house in order.
In the second half, Osman Salaheldin came off the bench to score his fourth of the tournament and Khartoum’s fourth of the game.
In the second game of the day, Kenya’s Gor Mahia beat Malakia of South Sudan 2-1 to reach the last four. Ugandan Godfrey Walusimbi, who passed a late fitness test after missing the two previous games, netted both goals.
Walusimbi gave the Gor Mahia the lead after just four minutes tapping home a Michael Olunga cross.
Malakia`s Thomas Jacob saw his header hit the crossbar in one of the many endless attacks the South Sudanese orchestrated midway into the first half.
The men from South Sudan failed to recover from a counter attack, and unmarked Walusimbi made it 2-0 off a Meddi Kagere cross from the right after 27 minutes.
Gor Mahia were punished for their complacency in the second half and Jacob headed home to make it 2-1.
Al Khartoum (Sudan) 4-0 APR (Rwanda)
Gor Mahia (Kenya) 2-1 Malakia (South Sudan)