A local official says the death toll in a militant ambush and shootout with security forces in Pakistan's northwest has reached at least 16. Mayor Haji Khan Afzal says 13 of the dead belong to the paramilitary Frontier Constabulary. At least three others are militants. Officials are still trying to retrieve bodies from the clash Saturday. Afzal, the mayor of Hangu district, said Sunday that after funerals, officials will try new negotiations with militants. Hangu district has experienced unrest since the recent arrest of a suspected militant leader known as Rafiuddin. The violence underscores the shaky hold the government has over stretches of its northwest, where Taliban militants have found safe havens.