London: Police say British lawmaker Jo Cox has died after being shot in the in the town of Birstall near Leeds, part of the area she represented.
Acting Chief Constable Dee Collins of West Yorkshire Police says authorities can't discuss any motive for the shooting yet but they have arrested a 52-year-old man and are not looking for anyone else in connection with the attack.
They say a man was also injured but is expected to survive.
British Prime Minister David Cameron says he has cancelled a planned pro-European Union speech in Gibraltar after Cox was shot. Cameron was scheduled to make a two-hour visit to Gibraltar Thursday to seek votes to keep Britain in the EU in the 23 June referendum. But he wrote on Twitter "I won't go ahead with tonight's rally in Gibraltar."
Groups on both sides of the referendum on whether Britain should leave the European Union have suspended campaigning.
The "remain" and "leave" campaigns said Thursday that campaign events will be stopped for the rest of the day.
Further details are expected shortly.