Cape Town - South Africa's Ilse Hayes has won a silver medal in the women's 100m T13 final at the London Paralympic Games on Thursday night.Hayes's second position was achieved in a time of 12.41 seconds. Cuba's Omara Durand won gold in 12.00 seconds to set a new Paralympic record, while France's Nantenin Keita took bronze in 12.47.Johanna Pretorius, the other South African taking part in the race, finished last out of the eight competitors in 13.50 seconds.Hayes's silver pushed South Africa's medal tally up to 20 (5 gold, 7 silver and 8 bronze). Shortly after the women's 100m race, South Africa's Teboho Mokgalagadi was in action in the men's 200m T35 final.Despite running a personal best time of 27.02 seconds, Mokgalagadi could only finish in fifth spot. Ukraine's Iurii Tsaruk won gold in a world record time of 25.86.The highlight of the evening's events is the men's 100m T44 final, which features South Africa's Oscar Pistorius and Arnu Fourie. The race starts at 22:24 (SA time).