SHANGHAI, Jan 25 (Reuters) - Hong Kong shares ended lower on Tuesday, dragged down by tech giants and financial firms on concerns that the U.S. Federal Reserve would tighten policies and rising geopolitical tensions related to Ukraine.

** The Hang Seng index fell 1.7%, to 24,243.61, while the China Enterprises index lost 1.8%, to 8,503.35 points.

** The Fed will begin its two-day meeting later on Tuesday, and NATO said on Monday it was putting forces on standby and reinforcing eastern Europe with more ships and fighter jets, in what Russia denounced as Western "hysteria" in response to its build-up of troops on the Ukraine border.

** The Hang Seng Tech index slumped 2.7%, with Alibaba Group and Meituan down 1.9% and 3%, respectively.

** The Cyberspace Administration of China launched a month-long "clean cyberspace" campaign, which would target online abuse, "chaos" in celebrity fan groups and "money worship", among other issues.

** The Hang Seng Finance index retreated 1.8%, with insurers AIA Group and Ping An down 3.1% and 5.7%, respectively.

** Healthcare firms plunged 3.7%. Alibaba Health Information Technology Ltd closed down 7% to become the largest percentage decliner on the Hang Seng index.

** Mainland real estate developers listed in Hong Kong closed 1.9% lower amid debt woes in the sector.

** China Evergrande Group dropped 6.5% as the cash-strapped developer sought more time from its offshore bondholders to work on a "comprehensive" and "effective" debt restructuring plan.

** Property developer Shimao Group Holdings pared early gains and ended down 1.3%, after it sold its holdings in a Guangzhou complex to a state-owned partner for 1.84 billion yuan ($290.65 million), following a sale of a commercial land in Shanghai last week. (Reporting by the Shanghai Newsroom; Editing by Shounak Dasgupta)