WATCH: Fans tear into referee over awarding Ulster penalty try for Rob Kearney foul

Ulster's 30-6 Guinness Pro12 victory against Leinster on Saturday wasn't without its controversy.

18 minutes into the clash, Leinster conceded a penalty try and Rob Kearney was sent to the sin bin for his foul on Ruan Pienaar. Ulster were on the attack when Pienaar chipped a kick deep into the Blues' 22 and chased after it in pursuit of a try. Kearney appeared to make no effort to get out of the scrum-half's way and proceeded to take him out off the ball, causing the South African to go crashing down to the ground in a heap. Referee George Clancy went to the TMO, then showed Kearney the yellow card and awarded a contentious penalty try to the Northern province. While everyone was unanimous in agreement that Kearney deserved a yellow card for the foul, very few could understand why the referee decided to award Ulster the penalty try when Kearney wasn't the last man, and also it looked as if Pienaar was never going to win the footrace to touch down a try. https://twitter.com/eimoflynn/status/726421173928517633 https://twitter.com/Dean__Sheridan/status/726418932035379200 https://twitter.com/SHovendenKeane/status/726418813756030977 https://twitter.com/RonanJQuinn/status/726417894935003136 https://twitter.com/MARK_GASKIN/status/726417873158193152 https://twitter.com/Pro12tipster/status/726417555833937920 https://twitter.com/decbreen/status/726417554768535553 https://twitter.com/RugbyKino/status/726417494760652803 https://twitter.com/wendymbyrne/status/726417334282407937 https://twitter.com/Dentistry777/status/726417267525832704 https://twitter.com/curates_egg/status/726417191738966016 https://twitter.com/Conor_Dempsey/status/726417006648541184 https://twitter.com/N_Mulv15/status/726416889757466624