Germany police on Friday said they had arrested a woman after at least 12 people were injured in a knife attack at the main station in the northern city of Hamburg.

The internal differences within the Bharat Rashtra Samithi came to the fore on Friday with party MLC K Kavitha taking exception to the letter she wrote to her father and party president K Chandrasekhar Rao (KCR) getting leaked.

A 39-year-old woman has been arrested and a major operation is under way, German police say. 

​A 39-year-old woman has been arrested and a major operation is under way, German police say.