The Haitian government has deployed specialist anti-gang police units, it said Friday, after an apparent massacre northwest of Port-au-Prince that the United Nations said left at least 70 dead. Carried out early Thursday in the town of Pont Sonde, some 100 kilometers (60 miles) from the capital, the attack saw scores of houses and vehicles torched after gang members opened fire. The killings come as an international policing mission, led by Kenyan forces, attempts to restore government control in Haiti, where armed gangs have seized swaths of the capital.