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.

Records obtained from the United States suggested Thomas Mair had links with a neo-Nazi organisation.

“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.

Tributes to Jo Cox were made by several of her fellow Labour MPs following a minute’s silence.

Vigils are planned across the UK throughout the weekend.

Books of condolence have also been opened for people to pay their respects.

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.