NATO is set to step up air defence and other security measures for Turkey, with the military alliance's foreign ministers pledging on Tuesday to stand by the country as it faces terrorist threats and tensions with Russia, dpa reported. "Allies stand in strong solidarity with Turkey," the ministers said in a joint statement following talks in Brussels. "We remain determined, in a spirit of 28 for 28, to continue developing additional NATO assurance measures." "Our ally Turkey is literally on the frontline," NATO Secretary General Jens Stoltenberg said. "We now are addressing how we can continue to augment the air defences of Turkey, how we can continue to follow up the standing defence plans for Turkey," he added.