At some point, it will start to dawn on Asian countries that domestic demand and exports to one another are just as important as exporting to America, and they will stop intervening.
The BBC's Abdullahi Kaura Abubakar in Kano says the Sunday evening attack on a police station in the Naibawa district, on the outskirts of Kano, happened just before the start of the dusk-to-dawn curfew.
The annual Tribute in Light, presented by the Municipal Art Society, will start at dusk on 11 September and be on display through dawn on 12 September.