In the worst Maoist attack, at least 73 CRPF and district force personnel were today killed when a large group of Naxals ambushed them in the thick Mukrana forests of Indias Chhattisgarh's Dantewada district. The dead included 73 CRPF men including a deputy and an assistant commandant, and a head constable of the district police force. 73 bodies of the personnel, who were part of a 80-member CRPF and a district police team, have been recovered from the site of the attack suspected to have been carried out by about 1000 Naxals , police spokesman and Inspector General R K Vij said.