The Somali immigrant charged with attempted murder in connection with a weekend vehicle and knife attack in Edmonton, Alberta, was detained in the United States pending deportation before claiming refugee status in Canada. <br/><br/>US officials said that Abdulahi Hasan Sharif, 30, is accused of running down a police officer with his car on Saturday night and then stabbing him repeatedly. Police said he fled before driving a U-Haul truck into four pedestrians during an attempt to evade capture.<br/><br/>Sharif was in custody in the United States for about four months in the summer and autumn of 2011, US Immigration and Customs Enforcement (ICE) spokeswoman Lauren Mack said in a statement. <br/><br/>He was ordered deported to Somalia but released on an order of supervision on 23rd of November 2011. Sharif did not appear for a scheduled meeting in January 2012, and efforts to locate him were not successful, the statement said.