Tribal militants blew up electricity pylons in the Pakistani province of Balochistan on Friday, blacking out large tracts of the region, before setting off a landmine that killed a power company official, police said. The official was on his way to the site of the explosions when the landmine went off. Three people were wounded. The attack came a day after Balochistan's provincial assembly set up a panel of peace brokers to negotiate with tribal chiefs leading the revolt against the Pakistan military in the resource-rich province. About 80 percent of Balochistan, including Quetta, was without electricity as a result of the sabotage, according to Quetta Electric Supply Company chief Nooruddin Mengal. "It will take 60 to 70 hours to restore full supplies," he said.