Samajwadi Party MP Akhilesh Yadav, the son of party chief Mulayam Singh Yadav, was arrested in Lucknow on Wednesday, to prevent him from taking part in protests against Uttar Pradesh Chief Minister Mayawati and her party. Yadav, who is president of the party's Uttar Pradesh unit, was held at Amausi airport shortly after he arrived from Delhi. The SP had called for a three-day long statewide agitation, from Monday against Mayawati and her government.