Brexit campaigning still halted as UK mourns slain lawmaker

Police continue to search the crime scene in Birstall, West Yorkshire, England Friday, June 17, 2016 the day after Labour MP Jo Cox was murdered in the street outside her constituency advice surgery. (Danny Lawson/PA via AP) UNITED KINGDOM OUT (The Associated Press)

Labour Party leader Jeremy Corbyn, centre, lays a candle as he and deputy leader Tom Watson, centre rear, Thursday June 16, 2016, attend an impromptu vigil at Parliament Square opposite the Palace of Westminster, central London, following the death of Labour Member of Parliament, Jo Cox. The British lawmaker who campaigned for the country to stay in the European Union was killed Thursday by a gun- and knife-wielding attacker in her small-town constituency, a tragedy that brought the country's fierce, divisive referendum campaign to a shocked standstill. (Philip Toscano/PA via AP) UNITED KINGDOM OUT (The Associated Press)

Campaigning in the referendum on Britain's membership in the European Union remains suspended as Britain mourns the killing of Labour Party legislator Jo Cox.

It is not yet clear when campaigning will resume ahead of the vital June 23 vote on whether Britain should remain in the 28-nation bloc.

There were tributes to the 41-year-old Cox across much of Britain Friday.

She was shot to death Thursday afternoon in her constituency near Leeds in northern England. A 52-year-old man has been arrested but has not been charged. He has been named locally as Tommy Mair.

West Yorkshire Police have not offered a motive for the slaying.