Police said the accident happened at 3.30pm on Pho Phraya-ThaRua road in front of a Bang Chak petrol station in Tambon Yilon. Thanaporn Saisil, 34, a saleswoman with Asia Medical Industry Co Ltd, was killed behind the wheel of her car. Pakhaporn Pongchup, 35, a teacher at a Suphan Buri school, died later at Wiset Chai Chan Hospital. Police said Pakhaporn was driving from Suphan Buri to return home in Ang Thong and Thanaporn from Ang Thong to Suphan Buri when the accident occurred. Police have yet to investigate the cause.