NATO Secretary General Jens Stoltenberg said the alliance has started dialogue with industry and allies on how to boost production and replenish weapons stocks.
Register now for FREE unlimited access to Reuters.com RegisterHe told a news conference that defence ministers would take decisions to increase stockpiles.
Nicolas Chamussy, chief executive of French defence firm Nexter, said industry had to respond to a dramatic increase in EU demand for military equipment, while production capacities were designed for peace time.
Last Friday European Union leaders agreed to give more financial and military aid to Ukraine.
Ukrainian President Volodymyr Zelenskiy will ask the leaders of the G7 group of nations to urgently supply Ukraine with air defence weapons.