The Jharkhand Assembly was today adjourned till 2 PM after the Opposition created pandemonium, demanding a CBI probe into the alleged horse trading in the run-up-to the Rajya Sabha polls.As soon as the House convened, the entire Opposition rushed to the well raising slogans against horse trading and demanded a CBI investigation.Speaker CP Singh adjourned the House till 2 PM after his request to the members to allow the Question Hour to be conducted fell on deaf ears.The Opposition's demand for a CBI probe came following the Election Commission on Friday countermanding the Rajya Sabha polls in the state in the wake of allegations of horse trading and seizure of over Rs 2 crore in cash. It said, the election process there has been seriously vitiated.