Maoist rebel leaders here said yesterday they had given up on efforts to make peace, blaming local police for mounting violence since a truce collapsed more than three months ago. Maoist emissaries P. Vavavara Rao and G. Kalyan Rao have withdrawn from the peace efforts in protest against the repression let loose by Andhra Pradesh government and the killing of 80 Maoists and other naxalites in alleged encounters by the police in the last 13 weeks. Explaining the reason for their decision, Vavavara Rao said: "Attempts to create tribal Greyhound (anti-extremist elite commando) force, impart training through the military to the Greyhound commandos, create joint command force by the Naxalite-affected states and, finally, the move to ban the CPI-Maoist not only in Andhra Pradesh but all over India under the Central Act indicate that the state and central governments are busy with the conspiracy to suppress the revolutionary movement through repressive measures."Peace talks between the Maoists and the Andhra Pradesh state government collapsed in January after 12 rebels were killed in clashes with police. The rebels had since set fresh conditions for talks including an end to all police action against them and the suspension of four district police chiefs. They accused the four of staging gun battles to kill captured rebels.