Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 months ago

Yes, fast is invalid immediately on the start of menstruation even if it starts few minutes before Maghrib. She will get her reward for the time which she fasted in that day, and she can eat or drink immediately, hut she must keep Qadha fast after the month of Ramadan.

Wassalam.