Krishna: In a terrible event 100 cows died in a Goshala at Kothuru Tadepalli in the outskirts of Vijayawada, yet few more cows are in critical condition. It is said that cows were fed at night on Friday being Varalakshmi Vratam in month of Sravanmas. There are suspicions that toxic substances were mixed in the feed, police are investigating. Vets stated conclusion can be made after the post-mortem. According to local residents, 24 cows died earlier due to poisoning.