GRAN CANARIA, Spain (Reuters) - The Spanish military has set up a camp for migrants stranded at a harbour on the Spanish island of Gran Canaria after a wave of arrivals overwhelmed local authorities’ capacity to house them. The camp, consisting of 23 tents with capacity for 200 people, was set up alongside an old military warehouse in Barranco Seco, the army said. More than 2,000 African migrants were stranded in the dockside earlier this week after a host of new arrivals over the weekend. The Interior Ministry has promised it would help provide proper shelter.