Attacks from Boko Haram militants are hurting the economies of Chad and northern Cameroon.The militants often attack trucks transporting goods to the two central African nations. Some of the goods come from Borno state in nearby Nigeria.Naffissa Adja works at one of the most popular stores in N'djamena, the capital of Chad. She says she was not paid last month.She adds that the store has not received supplies from Borno state for several months. Business is slow because of attacks on the store's supply trucks.Tocba Haman is a truck driver. He says he no longer goes to Nigeria for supplies because Boko Haram targets trucks and kills drivers.He says the militants continue to control Nigerian villages, especially around Borno state. They also seize goods and kill traders.He says business activity in Chad will continue to decrease, even with many soldiers on roads and in markets.