Raipur, Oct 8 (PTI) Chhattisgarh Governor Shekhar Dutt and Chief Minister Raman Singh today condemned yesterday's naxal attack in Dantewada district. Three jawans of the Sashastra Seema Bal (SSB) were killed and another was injured as the mini-truck carrying them was blown up in a landmine explosion in Bastanar area yesterday. Governor Dutt said in a message today that the incident showed that naxals were frustrated. Such acts undermined the development of the region, he said, paying homage to the dead SSB jawans. Chief Minister Raman Singh called the attack "cowardly" and "disgraceful".