The key facts about അറസ്റ്റ് (arrests) mentioned in the article are as follows. The article reports on a violent protest in Noida, where 300 people were arrested. The protest was allegedly linked to a pay hike demand. The article does not provide further details about the individuals arrested or the specific reasons behind the arrests. It also mentions that a minister alleged a connection to Pakistan, but the article does not elaborate on this claim. The article focuses on the violent nature of the protest and the subsequent arrests, without providing specific information about the individuals involved or the circumstances surrounding the arrests.