Police investigating the murder of British MP Jo Cox say their main lines of inquiry are the suspect’s mental health and his apparent connections to domestic extremism. <br /><br /> Records obtained from the United States suggested Thomas Mair had links with a neo-Nazi organisation. <br /><br /> “We are aware of the speculation within the media in respect of the suspect’s link to mental health services and this is a clear line of inquiry which we are pursuing. We are also aware of the inference within the media of the suspect being linked to right wing extremism which is again a priority line of inquiry which will help us establish the motive for the attack on Jo,’‘ West Yorkshire Police Temporary Chief Constable Dee Collins told reporters.<br /><br /> Tributes to Jo Cox were made by several of her fellow Labour MPs following a minute’s silence.<br /><br /> Vigils are planned across the UK throughout the weekend. <br /><br /> Books of condolence have also been opened for people to pay their respects. <br /><br /> The MP, who was fatally attacked on Thursday (June 17), lived on a houseboat on the river Thames with her husband and two young daughters.<br />