A man has been arrested in Mumbai's Naya Nagar area for allegedly asking two security guards their religion before stabbing them. Police sources told NDTV the accused - Zaib Zuber Ansari, 31 - demanded the guards recite the 'kalma', or the foundational doctrines of Islam. The guards - Rajkumar Mishra and Subroto Sen - were at an under-construction building behind Wockhardt Hospital when Ansari reportedly confronted and attacked them. The attack took place early on Monday, sometime around 4 am. Both suffered serious injuries and are receiving treatment at the same hospital. Mishra managed to get himself there on his own. But Sen needed a Good Samaritan, Nayab Sheikh.