NEW YORK (Reuters) – Citigroup Inc said on Tuesday it would purchase Deutsche Bank’s Mexican banking license in order to continue Citigroup’s corporate and investment banking operation in the country, following the planned sale of its local retail unit. Financial details were not disclosed, and Deutsche Bank said it would continue to grow and invest in Mexico through its broker dealer business there. “The acquisition of this license, which is subject to the receipt of all regulatory approvals, facilitates the pursuit of our consumer exit and ability to continue our institutional operations in …