The PGMOL have confirmed that they're "thoroughly reviewing" the offside incidents involving Arsenal and Brighton, who've already been contacted by Howard Webb.
Both clubs were left furious after drawing their games, against Brentford and Crystal Palace respectively, 1-1 this Saturday. While Brighton had Pervis Estupinan's well-taken goal at Palace incorrectly ruled out due "human error," title-chasing Arsenal conceded a controversial late equaliser which stunted their Premier League title charge.
After Gunners boss Mikel Arteta questioned the decision following his side's 1-1 draw, it emerged that video assistant referee Lee Mason had forgotten to draw the offside lines which would've resulted in the goal being chalked off. As Arsenal fans vented their fury on Sunday, the PGMOL - the body responsible for match officials in English professional football - released a statement.