Security forces are on high alert in naxal affects states of Chhattisgarh, Orissa, Bihar, West Bengal and Jharkhand. Home Ministry officials said in New Delhi today that Chattisgarh is on top alert in the wake of the killing of people by naxalites in Dantewada and a two day bandh call by ultras beginning this morning. <br/> <br/> The bandh has been called by the naxalites to protest the anti-maoist operations by the security forces. The centre had yesterday asked all the five states to tighten security and take maximum precaution during the bandh. The railways have also been advised to run train in naxal affected areas at slow speed to avoid possible sabotage of tracks and bridges. <br/>