Q: In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.
Context: Heightened Security measures continue to prevent & respond to any attacks. Since 13.9 until today 380 Arabs arrested involved in rioting Micky Rosenfeld (@MickyRosenfeld) October 15, 2015 Answer: for rioting
A:
why were arabs arrested today